What is expand (x+8y=9,)(-3x-5y=12) ?

The solution to expand (x+8y=9,)(-3x-5y=12) is -3x^2-5xy=12

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expand (x+8y=9,)(-3x-5y=12)

expand

(x + 8 y = 9,) (- 3 x - 5 y = 12)

- 3 x^{2} - 5 x y = 12

Solution steps

(x + 8 y = 9,) (- 3 x - 5 y = 12)

= (x + 8 \cdot 9 =, y) (- 3 x - 5 \cdot 12 = y)

Apply FOIL method:

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

a = x, b = 8 y = 9,, c = - 3 x, d = - 5 y = 12

x (- 3 x) + x (- 5 y = 12) + 8 y = 9, (- 3 x) + 8 y = 9, (- 5 y = 12)

Apply minus-plus rules

+ (- a) = - a

- 3 xx - 5 x y = 12 - 8 y = 9, 3 x - 8 y = 9, 5 y = 12

Expand

- 3 xx - 5 x y : - 3 x^{2} - 5 x y

- 3 x^{2} - 5 x y = 12

\frac{4 ^{3}}{5 ^{3}}

(x + 3 + 4 i) (x + 3 - 4 i) (x - 15)

(9 + i)^{5}

(x - 1) (x - 1 + 3)

X (F (X) X + 1 = + 1)

What is expand (x+8y=9,)(-3x-5y=12) ?
The solution to expand (x+8y=9,)(-3x-5y=12) is -3x^2-5xy=12