find roots of quadratic question eq by formula method = x²-4x + 4 = 0
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Answer:
a=1, b=-4, c=4
D=under root b Square - 4ac
Under root (-4)Square - 4 into 1 into 4
Under root 16-16
Under root 0
0 =0
Two equal roots
x = - b +
- under root d/2a
x= - (-4) +
- under root 0/2 into 1
x=4 +
- 0/2
x=4+0/2
x=2
Negative
x=4-0/2
x=2
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