Question

13. Evaluate (8x + 3y)2 by using a suitable identity.​

Answer 1

Answer:

(8x+3y) ^2

the identity which we use in given eq.

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

= 64x^2+ 9y^2+2× 8x×3y

= 64x^2+ 9y^2 + 48 xy

Answer 2

Answer:

$64 {x}^{2} + 48xy + 9 {y}^{2}$

Step-by-step explanation:

by identity (a+b)^2 we can do this,

as

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

now just we have to put the values,

a=8x and b=3y,

therefore,

${(8x + 3y)}^{2} = (8x)^{2} + 2 \times 8x \times 3y + {(3y)}^{2}$

which equals to,

${(8x + 3y)}^{2} = {64x}^{2} + 48xy + {9y}^{2}$

Hope it helps you and please mark me as brainliest for this...