The trinomial a² − 4ab + 4b² is equal to:
A) 2(a + b)²
B) (a − 2b)²
C) a² − b²
D) a² + b²
E) a² + b²
IMAT 2025 · Question 51
Q51 - Factorisation of polynomials
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The correct answer is B) (a − 2b)².
a² − 4ab + 4b² is a perfect square: (a − 2b)². Expand it to check: a² − 4ab + 4b².
(Options D and E are identical in the original paper. Neither is right anyway.)
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