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Which expression is equivalent to 3(x2+2x+3)?3(x^{2}+2x+3)?3(x2+2x+3)?
A: 3x2+6x+9\text{A: }3x^{2} + 6x + 9A: 3x2+6x+9 B: 3x2+2x+3\text{B: }3x^{2} + 2x + 3B: 3x2+2x+3
Which expression is equivalent to 3−(x−2)?3-(x-2)?3−(x−2)?
A: 1−x\text{A: }1-xA: 1−x B: 5−x\text{B: }5-xB: 5−x
Which expression is equivalent to 3+x2+y?\dfrac{3+x}{2+y}?2+y3+x?
A: 32+xy\text{A: }\dfrac{3}{2} + \dfrac{x}{y}A: 23+yx B: 32+x2+3y+xy\text{B: }\dfrac{3}{2} + \dfrac{x}{2} + \dfrac{3}{y} + \dfrac{x}{y}B: 23+2x+y3+yx
Which expression is equivalent to a+b?\sqrt{a+b}?a+b?
A: a+b\text{A: }\sqrt{a} + \sqrt{b}A: a+b B: a+2ab+b\text{B: }\sqrt{a} + 2\sqrt{ab} + \sqrt{b}B: a+2ab+b
Which expression is equivalent to (a⋅b)+c?(a \cdot b) + c?(a⋅b)+c?
A: (a+c)(b+c)\text{A: }(a+c)(b+c)A: (a+c)(b+c) B: a⋅(b+c)\text{B: }a \cdot (b+c)B: a⋅(b+c)
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