What is expand (3x+9y=4,)(2x-y=2) ?

The solution to expand (3x+9y=4,)(2x-y=2) is 6x^2-3xy=2

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expand (3x+9y=4,)(2x-y=2)

expand

(3 x + 9 y = 4,) (2 x - y = 2)

6 x^{2} - 3 x y = 2

Solution steps

(3 x + 9 y = 4,) (2 x - y = 2)

= (3 x + 9 \cdot 4 =, y) (2 x - 2 = y)

Apply FOIL method:

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

a = 3 x, b = 9 y = 4,, c = 2 x, d = - y = 2

3 x \cdot 2 x + 3 x (- y = 2) + 9 y = 4, 2 x + 9 y = 4, (- y = 2)

Apply minus-plus rules

+ (- a) = - a

3 \cdot 2 xx - 3 x y = 2 + 9 y = 4, 2 x - 9 y = 4, y = 2

Expand

3 \cdot 2 xx - 3 x y : 6 x^{2} - 3 x y

6 x^{2} - 3 x y = 2

(x y - 2 x + 4 y - 8) d y - (x y + 3 x - y - 3) d x

- \frac{1}{8} (10 - x) + \frac{x}{2 π}

5 (7 - 3)

(4 x^{3} + 5) (x^{4} + 5 x)^{\frac{1}{2}}

- \frac{s + 3}{( s + 5 ) ( s ^{2} + 4 s + 5 )}

What is expand (3x+9y=4,)(2x-y=2) ?
The solution to expand (3x+9y=4,)(2x-y=2) is 6x^2-3xy=2