solve a quadratic equation using factorization method:x2 - x - 156=0
Shreya1001:
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x2-x-156
x2-13x+12x-156
x(x-13)+12(x-13)
(x-13)(x+12)
x2-13x+12x-156
x(x-13)+12(x-13)
(x-13)(x+12)
Answered by
7
X*2 - X - 156 = 0
Solution:- 156 X*2
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+12X -13X
X*2 - X - 156 = 0
X*2 + 12X - 13X - 156 = 0
X ( X + 12) - 13 ( X + 12) = 0
( X + 12) ( X - 13) = 0
Therefore X + 12 = 0, X - 13 = 0
X = -12. X = 13
Solution:- 156 X*2
/\
+12X -13X
X*2 - X - 156 = 0
X*2 + 12X - 13X - 156 = 0
X ( X + 12) - 13 ( X + 12) = 0
( X + 12) ( X - 13) = 0
Therefore X + 12 = 0, X - 13 = 0
X = -12. X = 13
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