What is expand (x-y=5,)(x+2y=7) ?

The solution to expand (x-y=5,)(x+2y=7) is x^2+2xy=7

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expand (x-y=5,)(x+2y=7)

expand

(x - y = 5,) (x + 2 y = 7)

x^{2} + 2 x y = 7

Solution steps

(x - y = 5,) (x + 2 y = 7)

= (x - 5 =, y) (x + 2 \cdot 7 = y)

Apply FOIL method:

(a + b) (c + d) = a c + a d + b c + b d

a = x, b = - y = 5,, c = x, d = 2 y = 7

xx + x \cdot 2 y = 7 + (- y = 5,) x + (- y = 5,) \cdot 2 y = 7

Apply minus-plus rules

+ (- a) = - a

xx + 2 x y = 7 - y = 5, x - y = 5, 2 y = 7

Expand

xx + 2 x y : x^{2} + 2 x y

x^{2} + 2 x y = 7

\frac{x}{( x - 2 ) ( x - 3 ) ( s - 6 )}

\frac{( 4 x - 1000 ) ^{2}}{9}

e^{2 x} (2 x e^{2 x} + e^{2 x})

3250 + 5160

\frac{( 7 x ^{2} - 17 x + 6 ) x + 2}{7 x - 3}

What is expand (x-y=5,)(x+2y=7) ?
The solution to expand (x-y=5,)(x+2y=7) is x^2+2xy=7