Question

What are the factors of 25x2 + 40x + 16?

(5x + 4)(5x + 4)

(5x − 4)(5x − 4)

(5x + 2)(5x + 8)

(5x − 8)(5x − 2)

Answer 1

(5x + 4)(5x + 4)

Answer 2

please explain

Answer 3

Use the quadratic formula (-b +- sqrt (b^2 - 4ac)) / (2a) where the equation is in the form of ax^2 + bx + c = 0

Answer 4

25x^2+40x+16=0

Answer 5

Or you can try this
25x^2 + 40x + 16 = 25x^2 + 20x + 20x + 16 = 5x(5x + 4) + 4(5x + 4) = (5x + 4)(5x + 4)

Answer 6

well thank you ! :)