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3x^{2}-x+15
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3x^{2}-x+15
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5x^{2}-\left(2x^{2}+x-15\right)
Use the distributive property to multiply x+3 by 2x-5 and combine like terms.
5x^{2}-2x^{2}-x+15
To find the opposite of 2x^{2}+x-15, find the opposite of each term.
3x^{2}-x+15
Combine 5x^{2} and -2x^{2} to get 3x^{2}.
5x^{2}-\left(2x^{2}+x-15\right)
Use the distributive property to multiply x+3 by 2x-5 and combine like terms.
5x^{2}-2x^{2}-x+15
To find the opposite of 2x^{2}+x-15, find the opposite of each term.
3x^{2}-x+15
Combine 5x^{2} and -2x^{2} to get 3x^{2}.
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