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OpenStudy (anonymous):
2xsquared - 8x - 10 = 0
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OpenStudy (aroub):
2x^2-8x-10=0 2(x^2-4x-5)=0 2(x-5)(x+1)=0
OpenStudy (aroub):
x=5 or x=-1
OpenStudy (angela210793):
D=b^2-4ac=64-4*2*(-10)=144 sqr144=12 x1=(-b+sqrD)/2a=8+12)4=5 x2=(-b-sqrD)/2a=(8-12)/4=-1
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