What is expand (4m+2n=70,)(-3m+4n=30) ?

The solution to expand (4m+2n=70,)(-3m+4n=30) is -12m^2+16mn=30

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expand (4m+2n=70,)(-3m+4n=30)

expand

(4 m + 2 n = 70,) (- 3 m + 4 n = 30)

- 12 m^{2} + 16 mn = 30

Solution steps

(4 m + 2 n = 70,) (- 3 m + 4 n = 30)

= (4 m + 2 \cdot 70 =, n) (- 3 m + 4 \cdot 30 = n)

Apply FOIL method:

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

a = 4 m, b = 2 n = 70,, c = - 3 m, d = 4 n = 30

4 m (- 3 m) + 4 m \cdot 4 n = 30 + 2 n = 70, (- 3 m) + 2 n = 70, 4 n = 30

Apply minus-plus rules

+ (- a) = - a

- 4 \cdot 3 mm + 4 \cdot 4 mn = 30 - 2 n = 70, 3 m + 2 n = 70, 4 n = 30

Expand

- 4 \cdot 3 mm + 4 \cdot 4 mn : - 12 m^{2} + 16 mn

- 12 m^{2} + 16 mn = 30

\frac{1}{( x + n + 1 ) ^{2}}

3 (403)

- sin (x y) (y + x \frac{d y}{d x} = 12 y^{2} \frac{d y}{d x} + 6 x)

\frac{( a - x ) ^{3}}{3}

(- e^{x} sin (x) + cos (x) e^{x})^{2}

What is expand (4m+2n=70,)(-3m+4n=30) ?
The solution to expand (4m+2n=70,)(-3m+4n=30) is -12m^2+16mn=30