Separate and simplify the common terms.
5x^2 - X^2 = 4x^2
-7x - 2x = -9x
Now put these terms back together
4x^2 - 9x
Or if simplified further, you get:
x(4x-9)
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The value of x2+7x+10 depends on the value of X. If x=1, then x2+7x+10 = 18 If x=2, then x2+7x+10 = 28 If x=3, then x2+7x+10 = 40 and so forth
It is: 4x -34x^2 -21 simplified
x2 + 7x - 8 = (x + 8)(x - 1)
x2 × 2x = 2x3
x2 - 7x = 60 x2 - 7x - 60 = 0 (x - 12) (x + 5) = 0 x = 12 or x = -5