Solve (x-2)(4x-1)

Question

Simplify the expression

4 x^{2} - 9 x + 2

Evaluate

(x - 2) (4 x - 1)

Apply the distributive property

x \times 4 x - x \times 1 - 2 \times 4 x - (- 2 \times 1)

Multiply the terms

More Steps

Evaluate

x \times 4 x

Use the commutative property to reorder the terms

4 x \times x

Multiply the terms

4 x^{2}

4 x^{2} - x \times 1 - 2 \times 4 x - (- 2 \times 1)

Any expression multiplied by 1 remains the same

4 x^{2} - x - 2 \times 4 x - (- 2 \times 1)

Multiply the numbers

4 x^{2} - x - 8 x - (- 2 \times 1)

Any expression multiplied by 1 remains the same

4 x^{2} - x - 8 x - (- 2)

If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses

4 x^{2} - x - 8 x + 2

Solution

More Steps

Evaluate

- x - 8 x

Collect like terms by calculating the sum or difference of their coefficients

(- 1 - 8) x

Subtract the numbers

- 9 x

4 x^{2} - 9 x + 2

Show Solution

Find the roots

x_{1} = \frac{1}{4}, x_{2} = 2

Alternative Form

x_{1} = 0.25, x_{2} = 2

Evaluate

(x - 2) (4 x - 1)

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

(x - 2) (4 x - 1) = 0

Separate the equation into 2 possible cases

x - 2 = 0 4 x - 1 = 0

Solve the equation

More Steps

Evaluate

x - 2 = 0

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

x = 0 + 2

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

x = 2

x = 2 4 x - 1 = 0

Solve the equation

More Steps

Evaluate

4 x - 1 = 0

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

4 x = 0 + 1

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

4 x = 1

Divide both sides

\frac{4 x}{4} = \frac{1}{4}

Divide the numbers

x = \frac{1}{4}

x = 2 x = \frac{1}{4}

Solution

x_{1} = \frac{1}{4}, x_{2} = 2

Alternative Form

x_{1} = 0.25, x_{2} = 2

Show Solution