solve by formula method x²+2x-7=0
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Answer:
x^+2x-7=0
=x^+2x=7
=3x^=7
=x^=7/3
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Step-by-step explanation:
(x² +2x) - 7 = 0
2x³ - 7 = 0
2x³ = 0 + 7
2x³ = 7
x³ = 7 divided by 2
x³ = 3.5
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