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Earn +20 ptsQ: How do you factor -x2 plus x plus 42?
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What is the factor x2 plus x minus 42?
(x + 7)(x - 6)
Factor x2 plus x - 42?
44
What is the factorization of the trinomal below -x2 plus x plus 42?
-x2 + x + 42= -x2 + 7x - 6x + 42= 7x - x2 + 42 - 6x= x(7 - x) + 6(7 - x)= (7 - x)(x + 6)
What is a factor of x2 plus 19x - 42?
X2 + 19X - 42 = 0What two factors of - 42 add up to 19?(X - 2)(X + 21)----------------------FOIL and see the function reappear.X = 2X = - 21
What is -x2 plus x plus 42?
= -(x - 7)(x + 6)
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