Question

Solve the equation x2+11x-15=0, give ans to two dp.

Answer 1

Im going to assume you know the formula.
sooo.
x= -11 +- √ (11)² -4 (1) (-15)
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2(1)

= -11 +- √121- (-60)
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2

= -11 +- √181
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2

= -11 +- 13.45
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2

Either: Or:
X = -11 - 13.45
x = -11 + 13.45 ---------------
2
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2
x = 1.23 x= -12.23