展开 (8x+8y=2) 1/2

解答

展开

(8 x + 8 y = 2) \frac{1}{2}

4 x + 4 y = 2

求解步骤

(8 x + 8 y = 2) \frac{1}{2}

= \frac{1}{2} (8 x + 8 \cdot 2 = y)

使用分配律:

a (b + c) = ab + a c

a = \frac{1}{2}, b = 8 x, c = 8 y = 2

\frac{1}{2} \cdot 8 x + \frac{1}{2} \cdot 8 y = 2

8 \cdot \frac{1}{2} x + 8 \cdot \frac{1}{2} y = 2

乘开

8 \cdot \frac{1}{2} x + 8 \cdot \frac{1}{2} y : 4 x + 4 y

4 x + 4 y = 2

e x p an d \frac{( x ^{2} - x + 4 )}{( x + 3 ) ( x - 1 ) ( x + 2 )}

e x p an d \frac{2 ( y + 6 )}{3}

e x p an d \frac{( 2 - x ) \times ( x + 3 ) ^{2}}{( x ^{2} + x + 1 ) ( x - 5 )}

e x p an d (- 3, 2) y (5, - 1)

e x p an d \frac{( 4 - m ^{3} ) ^{7}}{128 m ^{7}}