Question

Help please







simplify (5x-3)^2

Answer 1

• 25x² - 30x + 9

Explanation:

The identity

• (a - b)² = a² - 2ab + b²

In this case, a = 5x and b = 3, so substituting the values :

• (5x - 3)²
• (5x)² - 2(5x)(3) + (3)²
• 25x² - 30x + 9

Answer 2

`\Longrightarrow: \boxed{\sf{25x^2-30x+9}}`

Explanation:

Isolate the term of x from one side of the equation.

Use the perfect square formula.

`\underline{\text{PERFECT SQUARE FORMULA:}}`

`\Longrightarrow: \sf{(A-B)^2=A^2-2AB+B^2}`

(5x-3)²

(5x-3)²= (5x)²-2*5x*3+3²

Solve.

`\sf{(5x)^2-2*5x*3+3^2=\boxed{\sf{25x^2-30x+9}}}`

• Therefore, the final answer is 25x²-30x+9.