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CEMC Fermat, 2023 Difficulty 1.1 Junior Find the answer Canada
When x = 2 x=2 x = 2 2 x 2 + 3 x 2 2x^2+3x^2 2 x 2 + 3 x 2
Pick one
A 14 14 14 B 10 10 10 C 12 12 12 D 22 22 22 E 20 20 20
Solution When x = 2 x=2 x = 2 2 x 2 + 3 x 2 = 5 x 2 = 5 ⋅ 2 2 = 5 ⋅ 4 = 20 2x^2 + 3x^2 = 5x^2 = 5 \cdot 2^2 = 5 \cdot 4 = 20 2 x 2 + 3 x 2 = 5 x 2 = 5 ⋅ 2 2 = 5 ⋅ 4 = 20
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