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Ollie
Mathematics
19 October, 14:21
How can solve this. (X-2) (x+4)
+4
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Joyce Kim
19 October, 14:35
0
To expand
X times X = X^2
-2 times X = - 2X (add this to 4X to equal 2X)
4 times X = 4X
-2 times 4 = - 8
X^2 + 2X - 8
To solve when equation = 0
X = + 2 or - 4
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Wendy Estes
19 October, 14:49
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Inmultesti pe rand cu fiecare : x*x+x*4-2*x-2*4=x²+4x-2x-8=x²+2x-8
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