Question

using identity:- (5y+3)(5y+7)squareis​

Answer 1

Answer:

25y^2 - 50y + 21

Step-by-step explanation:

(5y +3) (5y+7) is of the form (x +a) (x + b) which is equal to X^2 - (a + b)x + ab

  (5y)^2 - (3 + 7)(5y) +(3)(7)

= 25y^2 - 10(5y) + 21

= 25y^2 - 50y + 21

This is your final answer...

:)