4x^2 + 25 - 20x can be expressed as the square of: Option 1: 2x - 5/2 Option 2: -2x - 5 Option 3: 2x - 5 Option 4: 2x + 5

Answer: 2x - 5. Solution: 4x^2-20x+25=(2x)^2-2(2x)5+5^2=(2x-5)^2.

Quantitative Reasoning

Miscellaneous

Easy

$4x^2 + 25 - 20x$ can be expressed as the square of:

$2x - \frac{5}{2}$

$-2x - 5$

$2x - 5$

$2x + 5$

✅ Correct Option: 3

$4x^2-20x+25=(2x)^2-2\cdot(2x)\cdot5+5^2=(2x-5)^2$ .

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