What is expand (x+2y=1,3)(x-2y=-7) ?

The solution to expand (x+2y=1,3)(x-2y=-7) is xx-2xy=-7x+2y=1,3x-2y=1,3*2y=-2y=1,3*7

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expand (x+2y=1,3)(x-2y=-7)

expand

(x + 2 y = 1, 3) (x - 2 y = - 7)

xx - 2 x y = - 7 x + 2 y = 1, 3 x - 2 y = 1, 3 \cdot 2 y = - 2 y = 1, 3 \cdot 7

Solution steps

(x + 2 y = 1, 3) (x - 2 y = - 7)

= (x + 2 \cdot 1 \cdot 3 =, y) (x - 2 = y - 7)

Distribute parentheses

xx + x (- 2 y =) + x (- 7) + 2 y = 1, 3 x + 2 y = 1, 3 (- 2 y =) + 2 y = 1, 3 (- 7)

Apply minus-plus rules

+ (- a) = - a

xx - 2 x y = - 7 x + 2 y = 1, 3 x - 2 y = 1, 3 \cdot 2 y = - 2 y = 1, 3 \cdot 7

- \frac{e ^{- 4 s}}{s ( s ^{2} + 2 s - 2 )}

\frac{2 X ^{2}}{( 0.04 - X ) \cdot ( 0.083 - X )}

(y + x y) d x + (2 y - x) d y

((ab + c d + e f + g h) + 1)^{2}

(3 - 2) y (0.4)

What is expand (x+2y=1,3)(x-2y=-7) ?
The solution to expand (x+2y=1,3)(x-2y=-7) is xx-2xy=-7x+2y=1,3x-2y=1,3*2y=-2y=1,3*7