What is factor a^2+10a+21 ?

The solution to factor a^2+10a+21 is (a+3)(a+7)

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factor a^2+10a+21

factor

a^{2} + 10 a + 21

(a + 3) (a + 7)

Solution steps

a^{2} + 10 a + 21

Break the expression into groups

= (a^{2} + 3 a) + (7 a + 21)

Factor out

a

from

a^{2} + 3 a : a (a + 3)

Factor out

7

from

7 a + 21 : 7 (a + 3)

= a (a + 3) + 7 (a + 3)

Factor out common term

a + 3

= (a + 3) (a + 7)

- 11 - x \geq - 7

∣ x - 3 ∣ = 6

\frac{13 !}{( 13 - 8 ) ! 8 !}

- 2 (y + 3) = 3 (y + 4) + 7

\frac{a ^{2} + 2 a - 3}{a + 3}