Question

a part solve please

Answer 1

1) 25x ^2 + 81

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

(5x+9)^2
(5x)^2 + 2(5)(9) + (9)^2
25x^2 + 90 + 81

25x^2 +81 + 90x

this is your answer...