What is factor r^2-3r-28 ?

The solution to factor r^2-3r-28 is (r+4)(r-7)

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factor r^2-3r-28

factor

r^{2} - 3 r - 28

(r + 4) (r - 7)

Solution steps

r^{2} - 3 r - 28

Break the expression into groups

= (r^{2} + 4 r) + (- 7 r - 28)

Factor out

r

from

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

Factor out

- 7

from

- 7 r - 28 : - 7 (r + 4)

= r (r + 4) - 7 (r + 4)

Factor out common term

r + 4

= (r + 4) (r - 7)

27 p^{3} - 8

3 \cdot \frac{4}{3}

\frac{c}{2} - 7 = - 4

x^{2} + 99 = 20 x

x^{2} + 2 x (0.994987437) = 0.01