Question

4x^2+42x-100=0 in completing square method

Answer 1

4x²+42x-100=0

(2x)²+2x(25-4)+(25)(-4)=0

(2x+25)(2x-4)=0

x=25/2 or 2

Answer 2

Answer:Hi there, hope it'll help you

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Step-by-step explanation:

4x²+42x-100 = 0

or, 2(2x²+21x-50) = 0

or, 2x²+21x-50 = 0

or, 2x²+(25-4)x-50 = 0

or, 2x² -4x +25x -50 =0

or, 2x(x-2) +25(x-2) =0

or, (2x+25)(x-2) = 0

Case 1:     (2x+25)=0

             or, x= -(25/2)

Case 2:     (x-2) = 0

             or, x=2

Value of x= -(25/2) or/and 2