Question

using identity (4x+9) (4x-5)
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Answer 1

(4x+9) (4x+9)

= (4x+9) whole sqaure

We know that

(a+b)whole sqaure = a^2+2ab+b^2

therefore

(4x)^2 + 2(4x)(9) + (9)^2

= 16x^2 + 72x + 81

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Answer 2

Step-by-step explanation:

✳Answer✳

✳(4x+9) (4x+9)✳

✳=(4x+9) whole square✳

✳We know that✳

✳(a+b) whole square = a^2+2ab+b^2✳

✳therefore✳

✳(4x)^2 + 2(4x)(9) + (9)^2✳

✳=16x^2 + 72x + 81✳