Factor -4 + 8a - 4a 2.
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Step-by-step explanation:
- 4 + 8a - 4a²
= - 4a² + 8a - 4
= - 1(4a² + 4 - 8a)
= - 1[(2a)² + 2² - 2.2a.2]
= - 1(2a - 2)²
= - 1(2a - 2)(2a - 2)
= - 4(a - 1)²
= 4(1 - a)²
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