What is factor r^2+r-20 ?

The solution to factor r^2+r-20 is (r-4)(r+5)

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factor r^2+r-20

factor

r^{2} + r - 20

(r - 4) (r + 5)

Solution steps

r^{2} + r - 20

Break the expression into groups

= (r^{2} - 4 r) + (5 r - 20)

Factor out

r

from

r^{2} - 4 r : r (r - 4)

Factor out

5

from

5 r - 20 : 5 (r - 4)

= r (r - 4) + 5 (r - 4)

Factor out common term

r - 4

= (r - 4) (r + 5)

e^{- 2 l n (y)}

9 x - (6 x - 1) = 2

\frac{1}{4} x^{2} - \frac{1}{9} y^{2}

22 \cdot 2

1.5 x^{2} + 15 x - 62.2 = 0