can you please TEACH me how to solve it
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you have to find factors of -18 that add up to 7, because that's what the coefficients imply
9 X -2 = -18 and 9 + -1 = 7
(x + 9)(x - 2) = 0
if a product of two numbers is zero, at least one of them must be zero, so
either x = -9 or x = 2, because these values make one or the other facto equal zero.
9 X -2 = -18 and 9 + -1 = 7
(x + 9)(x - 2) = 0
if a product of two numbers is zero, at least one of them must be zero, so
either x = -9 or x = 2, because these values make one or the other facto equal zero.
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x2+7x-18=0
Ok ...so do it like this way !
x2+9x-2x-18=0
x(x+9)-2(x+9)=0
(x+9)(x-2)=0
So its ...
x=(-9) or x=(2)
Hope u got that !
Ok ...so do it like this way !
x2+9x-2x-18=0
x(x+9)-2(x+9)=0
(x+9)(x-2)=0
So its ...
x=(-9) or x=(2)
Hope u got that !