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yKpoI14uk [10]
4 years ago
7

Got stumped on the (7x^2-2) part

Mathematics
1 answer:
stira [4]4 years ago
4 0
7x²-2=0
add 2 to both sides
7x²=2
divide by 7 both sides
x^2=\frac{2}{7}
sqrt both sides
x=+/-\frac{\sqrt{2}}{\sqrt{7}}
x=+/-\frac{\sqrt{14}}{7}



so the possible values of x are
x=\frac{5}{2},\frac{-\sqrt{14}}{7},\frac{\sqrt{14}}{7}
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