X2 + 3X = 0
X(X + 3) = 0
--------------------X is the greatest common factor
so,
X = 0
----------or
X = - 3
----------- assuming you might want to solve this type of problem some day
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-2
x2 + 3x + 7 = 5 ∴ x2 + 3x + 2 = 0 ∴ (x + 1)(x + 2) = 0 ∴ x ∈ {-2, -1}
3x-1 = 11 3x = 11+1 3x = 12 x = 4 Therefore: x2+2 = 18
-2x + 3x = -4 By combining like terms we get: x = -4.
is a quadratic equation for y, in terms of x.