Answer: x = 5/2 = 2.5
Explanation:
Given expression
2x (x + 3) = 2x² + 15
Expand parentheses and apply the distributive property
2x · x + 2x · 3 = 2x² + 15
2x² + 6x = 2x² + 15
Subtract 2x² on both sides
2x² + 6x - 2x² = 2x² + 15 - 2x²
6x = 15
Divide 6 on both sides
6x / 6 = 15 / 6
x = 15/6
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