Question 410099
1. 8x^2-10x+3/6x^2+3x-3
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Factor numerator and denominator:
[8x^2+4x+6x+3] / [3(2x^2+x-1)]
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= [4x(2x+1)+3(2x+1)] / [3(2x-1)(x+1)]
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= [(2x+1)(4x+3)] / [3(2x-1)(x+1)]
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2. (x^2-4/x^2-1)*(x+1/x^2+2x)
[(x-2)(x+2)/(x-1)(x+1)] * [(x+1)/x(x+2)]
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Cancel:
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=[(x-2)/(x-1)] * [1/x]
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3. (7/5y+25)-(4/3y+15)
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= [7/5(y+5)] - [4/3(y+5)]
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least common denominator is 15*(y+5)
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= [21/lcd] - [20/lcd]
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= 1/[15(y+5)]
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Cheers,
Stan H.
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