7 • 0 = 0. Any number multiplied by 0 is 0.
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There is a formula for "the difference of squares." (x + 7)(x - 7) = 0 x = 7, -7
A quadratic equation. If you wish to solve for x, you can do so as follows: -x2 + 6x + 7 = 0 x2 - 6x - 7 = 0 (x - 7)(x + 1) = 0 x ∈ {-1, 7}
Factor the original equation to get (x-7)(x+2)=0, so x=7 or x=-2
x = 12
If: x = 2/3 and x = 5/7 Then: (3x-2)(7x-5) = 0 Equation: 21x2-29x+10 = 0