化简 (3b^2+4b-5)+(5+4b^2-8b)

解答

化简

(3 b^{2} + 4 b - 5) + (5 + 4 b^{2} - 8 b)

7 b^{2} - 4 b

求解步骤

(3 b^{2} + 4 b - 5) + (5 + 4 b^{2} - 8 b)

化简

(3 b^{2} + 4 b - 5) + (5 + 4 b^{2} - 8 b) : 3 b^{2} + 4 b - 5 + 5 + 4 b^{2} - 8 b

= 3 b^{2} + 4 b - 5 + 5 + 4 b^{2} - 8 b

对同类项分组

= 3 b^{2} + 4 b^{2} + 4 b - 8 b - 5 + 5

s im pl i f y tan (a) + \frac{1}{tan ( a )}

s im pl i f y \frac{r ^{1} + r ^{2} + r ^{3} + r ^{4} + r ^{5}}{5}

f a c t or 6 x^{4} - 11 x^{3} - 6 x^{2} + 9 x - 2

s im pl i f y \frac{( 7 x ^{2} \cdot x \cdot ( x y ) ^{6} )}{( x ^{9} \cdot y ^{3} )}

f (t) = cos (t) (3)^{\frac{1}{2}}