Factorize
21 x square - 8 x minus 4 is equal to zero
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2
Answer:
Step-by-step explanation:
D=b^2-4ac
D=400
√D=20
So,x=-b+or-√D /2a
= 8+or-20/42
X=14/21 or 3/7
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Answer:
5^2 - 8x - 4 = 0
5x^2 - 10x - 2x - 4=0
5x( x-2) -2(x-2)
(x-2) (5x -2)
x-2 ,x= 2
5x-2=0,x= 2/5
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