Question

please solve this very important​

Answer 1

Answer:

49a2 + 84ab + 36b2

Step-by-step explanation:

By using the formula

$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2}$

we get,

$= (7a) {}^{2} + 2 \times 7a \times 6b + (6b) {}^{2}$

$(7a + 6b) {}^{2}$

I hope this helps you.