Question

Solve part 3rd and it's answer is -2x^3 - x^2 + 3x - 12 but when I m solving it my answer is coming 5x^3 + 7x - 12. Please solve it and tell me what mistake I am doing.
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. please don't spam coz today is my test.​

Answer 1

Answer:

Subtract 3x^3 + x^2 + 3 from x^3 + 3x - 9

Answer 2

QUESTION:

$what \: must \: be \: Subtracted \: from \: {x}^{3} + 3x - 9 \: to \: get \: {3x}^{3} + {x}^{2} + 3$

SOLUTION:

${x}^{3} + {0x}^{2} + 3x - 9 + ( {3x}^{3} + {x}^{2} + 0x + 3) = x \\ = > {x}^{3} + {0x}^{2} + 3x - 9 + {3x}^{3} + {x}^{2} + 0x + 3 = x \\ = > {x}^{3} + {3x}^{3} + {x}^{2} + {0x}^{2} + 3x + 0x - 9 + 3 = x \\ = > {4x}^{3} + {x}^{2} + 3x - 6 = x$

CONCLUSION:

4x^3 + x^2 + 3x - 6 is the Right Answer. The Steps are Given Above...

HOPEFULLY, IT'S HELPFUL....

✨ Happy Learning! ✨