What is factor a^2+a-72 ?

The solution to factor a^2+a-72 is (a-8)(a+9)

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factor a^2+a-72

factor

a^{2} + a - 72

(a - 8) (a + 9)

Solution steps

a^{2} + a - 72

Break the expression into groups

= (a^{2} - 8 a) + (9 a - 72)

Factor out

a

from

a^{2} - 8 a : a (a - 8)

Factor out

9

from

9 a - 72 : 9 (a - 8)

= a (a - 8) + 9 (a - 8)

Factor out common term

a - 8

= (a - 8) (a + 9)

5 x^{2} + 13 x = 6

- 3 h + 2 \geq 8

144 x^{2} - 81 = 0

\frac{1}{7} - 2

\frac{25 x ^{2} - 49}{x ^{2} - 36} \leq 0