What is the answer to X(X+1)+3=X(X+3) ?

The answer to X(X+1)+3=X(X+3) is X= 3/2

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X(X+1)+3=X(X+3)

X (X + 1) + 3 = X (X + 3)

X = \frac{3}{2}

Decimal Notation

X = 1.5

Solution steps

X (X + 1) + 3 = X (X + 3)

Expand

X (X + 1) : X^{2} + X

X^{2} + X + 3 = X (X + 3)

Expand

X (X + 3) : X^{2} + 3 X

X^{2} + X + 3 = X^{2} + 3 X

Move

3

to the right side

X^{2} + X = X^{2} + 3 X - 3

Subtract

X^{2} + 3 X

from both sides

X^{2} + X - (X^{2} + 3 X) = X^{2} + 3 X - 3 - (X^{2} + 3 X)

Simplify

- 2 X = - 3

Divide both sides by

- 2

X = \frac{3}{2}

5 (3 x - 2) = 2 (x + 3) - 3

\frac{x}{4} - \frac{x}{8} = 2 x

x, 5 x + 7 y = - 2

3 (x - 4) = - 2 + 3 x - 10

m, K = \frac{1}{2} m v^{2}