alleryStart learning →Factorise 2x²+6x+4 completely, keeping the numerical factor outside.
A(2x+1)(x+4)
B2(x+2)²
C2(x+1)(x+4)
D2(x+1)(x+2)
Answer & Solution
Correct answer: D. 2(x+1)(x+2)
Extracting 2 leaves x² + 3x + 2, whose factors use constants 1 and 2.
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