Question

4x^2=20x solve?

Answer 1

x = 4, x = 5

x = 4, x = −5

x = 0, x = 5

x = 0, x = −5

Answer 2

i need to know wich one it is?

Answer 3

0 and 5

Answer 4

thank you :)

Answer 5

4x^2=20x

4x^2- 20x = 0

4x( x - 5 ) = 0

4x = 0 or x-5 = 0

x = 0/4 or x - 5 = 0

x = 0 or x = 5

Answer 6

I'm factoring, then using the zero product property to get the two answers

Answer 7

okay now i undestand.

Answer 8

an alternative is to just plug in the possible answers

so

4x^2 = 20x

4(0) = 20(0) ... plug in x = 0

0 = 0 .. that works

so x = 0 is a solution

and you repeat this for the other possible solutions