What is expand (1x+6y=2,7)(7x-3y=9) ?

The solution to expand (1x+6y=2,7)(7x-3y=9) is 7x^2-3xy=9

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expand (1x+6y=2,7)(7x-3y=9)

expand

(1 x + 6 y = 2, 7) (7 x - 3 y = 9)

7 x^{2} - 3 x y = 9

Solution steps

(1 \cdot x + 6 y = 2, 7) (7 x - 3 y = 9)

= (1 \cdot x + 6 \cdot 2 \cdot 7 =, y) (7 x - 3 \cdot 9 = y)

Apply FOIL method:

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

a = 1 \cdot x, b = 6 y = 2, 7, c = 7 x, d = - 3 y = 9

1 \cdot x \cdot 7 x + 1 \cdot x (- 3 y = 9) + 6 y = 2, 7 \cdot 7 x + 6 y = 2, 7 (- 3 y = 9)

Apply minus-plus rules

+ (- a) = - a

1 \cdot 7 xx - 1 \cdot 3 x y = 9 + 6 y = 2, 7 \cdot 7 x - 6 y = 2, 7 \cdot 3 y = 9

Expand

1 \cdot 7 xx - 1 \cdot 3 x y : 7 x^{2} - 3 x y

7 x^{2} - 3 x y = 9

\frac{x ( - 3 ln ( x ) + 2 )}{3}

\frac{( 5 x + 6 )}{( x + 2 ) ( x - 2 )}

(\frac{2}{s} - \frac{1}{s ^{3}})^{2}

(33 a - 3 x)^{3}

\frac{( 1 - 4 x ^{3} ) ( 3 + 8 x ^{3} )}{( 8 x ^{2} - 1 ) ( 8 x ^{2} - 3 )}

What is expand (1x+6y=2,7)(7x-3y=9) ?
The solution to expand (1x+6y=2,7)(7x-3y=9) is 7x^2-3xy=9