What is factor b^2-4b-45 ?

The solution to factor b^2-4b-45 is (b+5)(b-9)

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factor b^2-4b-45

factor

b^{2} - 4 b - 45

(b + 5) (b - 9)

Solution steps

b^{2} - 4 b - 45

Break the expression into groups

= (b^{2} + 5 b) + (- 9 b - 45)

Factor out

b

from

b^{2} + 5 b : b (b + 5)

Factor out

- 9

from

- 9 b - 45 : - 9 (b + 5)

= b (b + 5) - 9 (b + 5)

Factor out common term

b + 5

= (b + 5) (b - 9)

16 - 9 x^{2}

4 = \frac{1}{2} (3 x + 4)

6 = \frac{a}{4} + 2

2 y = - 7

6 y - 4 = \frac{y}{2} - 5