x square - 11 x - 42 = 0 complete squaring method
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X^2-14x+3x-42
x(x-14)+3(x-14)
(x-14)(x+3)
x(x-14)+3(x-14)
(x-14)(x+3)
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Answer:
-13 or 4
explanation
x square-11x-42=0
= -13+4
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