Question

What is the expansion formulae of (4a+7b)²​

Answer 1

$\huge\tt\red{Answer!}$

$\dasharrow {{(4a + 7b)}^{2} }\\ \\ \dasharrow{ {(4a)}^{2} + {(7b)}^{2} + 2.4a.7b} \\ \\ \dasharrow {{16a}^{2} + {49b}^{2} + 56ab}$

Answer 2

Answer:

(a+b)² = a² + 2ab + b²

Step-by-step explanation:

(4a+7b)² = (4a)² + 2(4a)(7b) + (7b)²

= 16a² + 56ab + 49b²