Solve the equation.
x2 + 8x = 20
x = 10, x = -2
x = 10, x = 2
x = -10, x = 1
x = -10, x = 2
x^2 + 8x - 20 = 0
(x +10)(x - 2) =0
x + 10 = 0
x - 2 = 0
x = -10 and x = 2
==
x^2 + 8x - 20 = 0 ==
(x+10)(x-2) = 0
So either x can equal -10 or 2
x^2 + 8x - 20 factors to give (x+10)(x-2), so the roots are -10 and +2.
first take the 20 and put it on the other side of the equation.
x2+8x-20=0
factor the equation.
(x+10)(x-2)=0
and then x= -10 and 2
is there anything you don't understand or don't know how i got that answer?
In order for you to get that answer, x must be the same meaning that x is 2 because you have to multiply in order for you to get that answer.
2 times 2=4 and 8 times 2 = 16 and 16+4=20. and there you go.
Comments
x^2 + 8x - 20 = 0
(x +10)(x - 2) =0
x + 10 = 0
x - 2 = 0
x = -10 and x = 2
==
x^2 + 8x - 20 = 0 ==
(x+10)(x-2) = 0
So either x can equal -10 or 2
x^2 + 8x - 20 factors to give (x+10)(x-2), so the roots are -10 and +2.
first take the 20 and put it on the other side of the equation.
x2+8x-20=0
factor the equation.
(x+10)(x-2)=0
and then x= -10 and 2
is there anything you don't understand or don't know how i got that answer?
In order for you to get that answer, x must be the same meaning that x is 2 because you have to multiply in order for you to get that answer.
2 times 2=4 and 8 times 2 = 16 and 16+4=20. and there you go.