Simplify : (Px – Q) (Px + Q) - Mathematics

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Sum

Simplify : (px – q) (px + q)

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Solution

(px – q) (px + q) = px(px + q) – q(px + q)

= p2x2 + pxq – pqx – q2

= p2x2 – q2

Concept: Multiplying a Polynomial by a Polynomial
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 3.2 | Page 143
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