What is expand (-5x+5y=-2,5)(8x-3y=30) ?

The solution to expand (-5x+5y=-2,5)(8x-3y=30) is -40x^2+15xy=30

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expand (-5x+5y=-2,5)(8x-3y=30)

expand

(- 5 x + 5 y = - 2, 5) (8 x - 3 y = 30)

- 40 x^{2} + 15 x y = 30

Solution steps

(- 5 x + 5 y = - 2, 5) (8 x - 3 y = 30)

= (- 5 x + 5 = y - 2 \cdot 5,) (8 x - 3 \cdot 30 = y)

Distribute parentheses

(- 5 x) \cdot 8 x + (- 5 x) (- 3 y = 30) + 5 y = 8 x + 5 y = (- 3 y = 30) + (- 2, 5) \cdot 8 x + (- 2, 5) (- 3 y = 30)

Apply minus-plus rules

+ (- a) = - a, (- a) (- b) = ab

- 5 \cdot 8 xx + 5 \cdot 3 x y = 30 + 5 y = 8 x - 5 y = 3 y = 30 - 2, 5 \cdot 8 x + 2, 5 \cdot 3 y = 30

Expand

- 5 \cdot 8 xx + 5 \cdot 3 x y : - 40 x^{2} + 15 x y

- 40 x^{2} + 15 x y = 30

(8, 6) (- 9, - 9) (x, - 8)

(r cos (θ) - 1)^{2}

\frac{1}{( s - 2 i ) ^{2}} + \frac{1}{( s + 2 i ) ^{2}}

224 (s + s^{'})^{9}

x + 2 (3 x - 2)

What is expand (-5x+5y=-2,5)(8x-3y=30) ?
The solution to expand (-5x+5y=-2,5)(8x-3y=30) is -40x^2+15xy=30