Please help me to solve it by using quadratic equations..
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Answer:
d = b²- 4ac
= 2²- 4x15x(-1)
= 4 + 60
= 64
X = -b ±√d/2a
= -2 ± √64/2x15
= -2 ±8/30
= -2+8/30 or -2-8/30
= 6/30 or -10/30
= 1/5 or -1/3
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