Question

plzzzzzzzzzzzz.........

Answer 1

(8x+3y)^2
(a+b)^2= a^2 + 2ab + b^2
Therefore 64x^2 + 2(8x)(3y) + 9y^2
=64x^2 + 48xy + 9y^2

Answer 2

${a}^{2} + {b}^{2} + 2ab = (a + b) {}^{2} \\ (8x + 3y) {}^{2} \\ {(8x})^{2} + {(3y)}^{2} + 2 \times 8x \times 3y \\ 64x {}^{2} + 9y {}^{2} + 48xy$