因式分解 (r+1)^2-7(r+1)-30

解答

因式分解

(r + 1)^{2} - 7 (r + 1) - 30

(r + 4) (r - 9)

求解步骤

(r + 1)^{2} - 7 (r + 1) - 30

乘开

(r + 1)^{2} - 7 (r + 1) - 30 : r^{2} - 5 r - 36

= r^{2} - 5 r - 36

分解

r^{2} - 5 r - 36 : (r + 4) (r - 9)

= (r + 4) (r - 9)

f a c t or ab + 1 + ab x + x

f a c t or 9 x^{2} + x + 3 x

f a c t or h (t) - e^{- tp}

f a c t or (x^{2} - y^{2})^{a^{2} - b^{2}}

f a c t or + 4 a m^{3} - 12 amn - m^{2} + 3 n