Question

16x2+72x+81 factorisation method ​

Answer 1

Answer:

$16x^{2}+72x+81=(4x+9)(4x+9)$

Explanation:

$16x^{2} +72x+81\\=16x^{2} +36x+36x+81\\=4x(4x+9)+9(4x+9)\\=(4x+9)(4x+9)$

∴$16x^{2}+72x+81=(4x+9)(4x+9)$

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Answer 2

Answer:

16x2 +72x+81

16x2+36x+36x+81

x(x+36)+36(x+36)

(x+36) ( x+36)