展开 (2x+3y=1,8)-(3x+2y=21)

解答

展开

(2 x + 3 y = 1, 8) - (3 x + 2 y = 21)

(2 x + 3 y = 1, 8) - 3 x - 2 y = 21

求解步骤

(2 x + 3 y = 1, 8) - (3 x + 2 y = 21)

= (2 x + 3 \cdot 1 \cdot 8 =, y) - (3 x + 2 \cdot 21 = y)

- (3 x + 2 y = 21) : - 3 x - 2 y = 21

(2 x + 3 y = 1, 8) - 3 x - 2 y = 21

e x p an d - \frac{18}{( x + 1 ) ^{4}}

e x p an d \frac{x ( x ^{2} + 4 x )}{5}

e x p an d \frac{( x - 8 )}{( x ( 3 x - 2 ) )}

e x p an d e^{t - 3} u (- t + 3)

e x p an d x^{2} (3 x^{3} - 2)^{4} d x