Question

Simplify: -10+3r+2r squared-r

Answer 1

Step-by-step explanation:

using

The quadratic general formula

which is

r= -b±√(b²-4ac)

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2a

b= coefficient of r=3

a = coefficient of r²=2

c= constant or number without any variable=-10

r= -3±√(3²-(4×2×-10)

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2×2

r=-3±√(9-(-80)

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4

r= -3±√(9+80)

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4