what is the sum of the polynomials?\n$(8x^{2}-9y^{2}-4x)+(x^{2}-3y^{2}-7x)$\n$7x^{2}-6y^{2}+3x$\n$9x^{2}-6y^{…

what is the sum of the polynomials?\n$(8x^{2}-9y^{2}-4x)+(x^{2}-3y^{2}-7x)$\n$7x^{2}-6y^{2}+3x$\n$9x^{2}-6y^{2}+3x$\n$9x^{2}-12y^{2}+3x$\n$9x^{2}-12y^{2}-11x$

what is the sum of the polynomials?\n$(8x^{2}-9y^{2}-4x)+(x^{2}-3y^{2}-7x)$\n$7x^{2}-6y^{2}+3x$\n$9x^{2}-6y^{2}+3x$\n$9x^{2}-12y^{2}+3x$\n$9x^{2}-12y^{2}-11x$

Answer

Explanation:

Step1: Combine like - terms of $x^{2}$

$(8x^{2}+x^{2})=9x^{2}$

Step2: Combine like - terms of $y^{2}$

$(-9y^{2}-3y^{2})=-12y^{2}$

Step3: Combine like - terms of $x$

$(-4x - 7x)=-11x$

Step4: Write the sum

$9x^{2}-12y^{2}-11x$

Answer:

$9x^{2}-12y^{2}-11x$