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Popular >

factor-x^2-4x+21

Solution

factor

- x^{2} - 4 x + 21

Solution

- (x - 3) (x + 7)

Solution steps

- x^{2} - 4 x + 21

Factor out

- 1 : - (x^{2} + 4 x - 21)

= - (x^{2} + 4 x - 21)

Factor

x^{2} + 4 x - 21 : (x - 3) (x + 7)

= - (x - 3) (x + 7)

Popular Examples

115x<56x^2-10x^3+51

115 x < 56 x^{2} - 10 x^{3} + 51

∣ 3 x - 5 ∣ < 7 - 2 x

simplify 6(3c+4)-3(2c-4)simplify

6 (3 c + 4) - 3 (2 c - 4)

8 x^{2} + 3 x - 1 = 0

simplify 3/14 sqrt(98)simplify

\frac{3}{14} 98

Frequently Asked Questions (FAQ)

What is factor-x^2-4x+21 ?
The solution to factor-x^2-4x+21 is -(x-3)(x+7)