2x square+3x-152 factorize it
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Answered by
10
2x²+3x-152
=2x²-16x+19x-152
=2x(x-8)+19(x-8)
=(2x+19)(x-8)
=2x²-16x+19x-152
=2x(x-8)+19(x-8)
=(2x+19)(x-8)
Answered by
1
There are many methods. One is by just looking at the polynomial expression. By guessing. Another is by finding rational factors like below. Another is by the solution for P(x)=0, roots of a quadratic equation. [-b+-\sqrt(b^2-4ac)] /2. I state one of these.
Try x =1, 2*1²+3*1-152 = -145 very high value.
So try x = 4, 2*4² + 3 * 4 - 152 = -108 still negative and hig h value
so try x = 8, 2 * 8² + 3 * 8 - 152 = 128+24-152 = 0
so x = 8 is a factor.
Then : (- 152 / 2 ) / 8 is the other factor = -19/2
Factorize by looking at the coefficient of x² and the constant term -152.
(x - 8) (2x + 152/8) = (x-8)(2x +19)
Try x =1, 2*1²+3*1-152 = -145 very high value.
So try x = 4, 2*4² + 3 * 4 - 152 = -108 still negative and hig h value
so try x = 8, 2 * 8² + 3 * 8 - 152 = 128+24-152 = 0
so x = 8 is a factor.
Then : (- 152 / 2 ) / 8 is the other factor = -19/2
Factorize by looking at the coefficient of x² and the constant term -152.
(x - 8) (2x + 152/8) = (x-8)(2x +19)
kvnmurty:
thanks n u r welcom
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