<h5>If a&sup2;-b&sup2;=21 and a&sup2;+b&sup2;=29, which of the following could be the value of ab?</h5>

<h2>Prepare your SAT with guaranteed improvement in your score.</h2>
<p>&nbsp;</p>
<p>ClassNotes has the best preparatory content for SAT exams with more than 2000 multiple choice questions (MCQs) at your disposal. Almost all important MCQs have solution steps written with expert information on how the correct answer is derived.</p>

SAT - Expert Plans

Get access to the best SAT preparation content on ClassNotes.

5 days money back guarantee

Interactive questions and flashcards

Ads free experience

Solution steps for all questions

Unlimited SAT diagnostic tests

Personalized study plans

Zoom call with NET expert

SAT Expert

Monthly

Seasonal Pass - 2024

SAT - Advanced Plans

SAT Advanced

<h2>Prepare your NUST Entrance Test (NET) with guaranteed improvement in your score.</h2>
<p>&nbsp;</p>
<p>ClassNotes has the best preparatory content for NET exams with more than 4000 multiple choice questions (MCQs) at your disposal. Almost all important MCQs have solution steps written with expert information on how the correct answer is derived.</p>
<p>&nbsp;</p>
<h4>If you want to prepare your NET, buy this package and maximize your chances of getting in to your preferred degree at the top university in Pakistan.</h4>

NUST Entry Test - Expert Plans

NUST Entrance Test

Get access to the best NUST Entry Test preparation content on ClassNotes. With the Geek plan you will also get access to personalized services like a 1-hour call with an alumni of NUST.

30 days money back guarantee

Interactive mcqs and flashcards

MCQs solution steps

Solved past papers

NET Expert

<h2>Prepare your FBISE Intermediate Exams for Class 11 and Class 12 with guaranteed improvement in your score.</h2>
<p>&nbsp;</p>
<p>ClassNotes has the best preparatory content for matric exams with more than 5000 multiple choice questions (MCQs) at your disposal.&nbsp;</p>
<p>&nbsp;</p>
<h4>If you want to prepare your FBISE Matriculation exams for class 11 and class 12, buy this package and ace your annual board examinations.</h4>

Intermediate - Expert Plans

Class 11

Class 12

Get access to the best FBISE exam preparation content and highest quality notes for your HSSC exams on ClassNotes.

High quality notes

No ads

No viewing limit

Zoom sessions with experts

Intermediate Expert

HSSC Annual Exam - 2024

<h2>Prepare your FBISE Matriculation Exams for Class 09 and Class 10 with guaranteed improvement in your score.</h2>
<p>&nbsp;</p>
<p>ClassNotes has the best preparatory content for matric exams with more than 5000 multiple choice questions (MCQs) at your disposal.&nbsp;</p>
<p>&nbsp;</p>
<h4>If you want to prepare your FBISE Matriculation exams for class 09 and class 10, buy this package and ace your annual board examinations.</h4>

Matriculation - Expert Plans

Class 09

Class 10

Get access to the best FBISE exam preparation content and highest quality notes for your Matriculation exams on ClassNotes.

Menu

Editor

If a²-b²=21 and a²+b²=29, which of the following could be the value of ab?

Sign In

Editor

If a²-b²=21 and a²+b²=29, which of the following could be the value of ab?