Solve 5x^2+16x+3 - ScanMath

Question

Factor the expression

(x + 3) (5 x + 1)

Evaluate

5 x^{2} + 16 x + 3

Rewrite the expression

5 x^{2} + (1 + 15) x + 3

Calculate

5 x^{2} + x + 15 x + 3

Rewrite the expression

x \times 5 x + x + 3 \times 5 x + 3

Factor out x from the expression

x (5 x + 1) + 3 \times 5 x + 3

Factor out 3 from the expression

x (5 x + 1) + 3 (5 x + 1)

Solution

(x + 3) (5 x + 1)

Show Solution

x_{1} = - 3, x_{2} = - \frac{1}{5}

Alternative Form

x_{1} = - 3, x_{2} = - 0.2

Evaluate

5 x^{2} + 16 x + 3

To find the roots of the expression,set the expression equal to 0

5 x^{2} + 16 x + 3 = 0

Factor the expression

More Steps

Evaluate

5 x^{2} + 16 x + 3

Rewrite the expression

5 x^{2} + (1 + 15) x + 3

Calculate

5 x^{2} + x + 15 x + 3

Rewrite the expression

x \times 5 x + x + 3 \times 5 x + 3

Factor out x from the expression

x (5 x + 1) + 3 \times 5 x + 3

Factor out 3 from the expression

x (5 x + 1) + 3 (5 x + 1)

Factor out 5 x + 1 from the expression

(x + 3) (5 x + 1)

(x + 3) (5 x + 1) = 0

When the product of factors equals 0,at least one factor is 0

x + 3 = 0 5 x + 1 = 0

Solve the equation for x

More Steps

Evaluate

x + 3 = 0

Move the constant to the right-hand side and change its sign

x = 0 - 3

Removing 0 doesn't change the value,so remove it from the expression

x = - 3

x = - 3 5 x + 1 = 0

Solve the equation for x

More Steps

Evaluate

5 x + 1 = 0

Move the constant to the right-hand side and change its sign

5 x = 0 - 1

Removing 0 doesn't change the value,so remove it from the expression

5 x = - 1

Divide both sides

\frac{5 x}{5} = \frac{- 1}{5}

Divide the numbers

x = \frac{- 1}{5}

Use \frac{- a}{b} = \frac{a}{- b} = - \frac{a}{b} to rewrite the fraction

x = - \frac{1}{5}

x = - 3 x = - \frac{1}{5}

Solution

x_{1} = - 3, x_{2} = - \frac{1}{5}

Alternative Form

x_{1} = - 3, x_{2} = - 0.2

Show Solution