Answer:
25x^2-80x+63
Step-by-step explanation:
(5x-7)(5x-9)
(x+a)(x+b)=x^2+(a+b)x+ab
(5x-7)(5x-9)=(5x)^2+(-7+ -9)(5x)+(-7× -9)
=25x^2-80x+63
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
Answer:
25x^2-80x+63
Step-by-step explanation:
(5x-7)(5x-9)
(x+a)(x+b)=x^2+(a+b)x+ab
(5x-7)(5x-9)=(5x)^2+(-7+ -9)(5x)+(-7× -9)
=25x^2-80x+63