What is expand (3x-y=30,)(4x+3y=1) ?

The solution to expand (3x-y=30,)(4x+3y=1) is 12x^2+9xy=1

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expand (3x-y=30,)(4x+3y=1)

expand

(3 x - y = 30,) (4 x + 3 y = 1)

12 x^{2} + 9 x y = 1

Solution steps

(3 x - y = 30,) (4 x + 3 y = 1)

= (3 x - 30 =, y) (4 x + 3 \cdot 1 = y)

Apply FOIL method:

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

a = 3 x, b = - y = 30,, c = 4 x, d = 3 y = 1

3 x \cdot 4 x + 3 x \cdot 3 y = 1 + (- y = 30,) \cdot 4 x + (- y = 30,) \cdot 3 y = 1

Apply minus-plus rules

+ (- a) = - a

3 \cdot 4 xx + 3 \cdot 3 x y = 1 - y = 30, 4 x - y = 30, 3 y = 1

Expand

3 \cdot 4 xx + 3 \cdot 3 x y : 12 x^{2} + 9 x y

12 x^{2} + 9 x y = 1

L (- 7, 3) M (4, - 2)

(x^{2} + 2 x y^{3}) d x

\frac{9}{( s \cdot ( s + 3 ) ^{2} )}

(3 + j) e^{\frac{jπ}{6}}

\frac{3 y ^{2} ( - 3 y + 3 ) ^{2}}{2}

What is expand (3x-y=30,)(4x+3y=1) ?
The solution to expand (3x-y=30,)(4x+3y=1) is 12x^2+9xy=1