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10+14x-12x^{2}
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10+14x-12x^{2}
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3x\left(-x\right)+9x-5\left(-x\right)-15-9x^{2}+25
Use the distributive property to multiply 3x-5 by -x+3.
3x\left(-x\right)+9x+5x-15-9x^{2}+25
Multiply -5 and -1 to get 5.
3x\left(-x\right)+14x-15-9x^{2}+25
Combine 9x and 5x to get 14x.
3x\left(-x\right)+14x+10-9x^{2}
Add -15 and 25 to get 10.
-3xx+14x+10-9x^{2}
Multiply 3 and -1 to get -3.
-3x^{2}+14x+10-9x^{2}
Multiply x and x to get x^{2}.
-12x^{2}+14x+10
Combine -3x^{2} and -9x^{2} to get -12x^{2}.
3x\left(-x\right)+9x-5\left(-x\right)-15-9x^{2}+25
Use the distributive property to multiply 3x-5 by -x+3.
3x\left(-x\right)+9x+5x-15-9x^{2}+25
Multiply -5 and -1 to get 5.
3x\left(-x\right)+14x-15-9x^{2}+25
Combine 9x and 5x to get 14x.
3x\left(-x\right)+14x+10-9x^{2}
Add -15 and 25 to get 10.
-3xx+14x+10-9x^{2}
Multiply 3 and -1 to get -3.
-3x^{2}+14x+10-9x^{2}
Multiply x and x to get x^{2}.
-12x^{2}+14x+10
Combine -3x^{2} and -9x^{2} to get -12x^{2}.
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