Question

Q 4. Factorize: X2-21 X +80


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Answer 1

Step-by-step explanation:

x^2-21x + 80=0

80x^2= -16x *-5x

-21x= -16x -5 x

x^2 -16 x -5x +80 =0

x(x-16) -5(x-16) = 0

(x-5) (x-16) = 0

x = 5 , or x = 16