Question

samuel found the difference of the polynomials.
$(15x^{2}+11y^{2}+8x)-(7x^{2}+5y^{2}+2x)=\square x^{2}+6y^{2}+6x$
what value is missing from his solution?

Explanation:

Step1: Distribute the negative sign

$(15x^2 + 11y^2 + 8x) - 7x^2 - 5y^2 - 2x$

Step2: Combine like $x^2$ terms

$15x^2 - 7x^2 = 8x^2$

Step3: Verify other terms (optional check)

$11y^2 - 5y^2 = 6y^2$, $8x - 2x = 6x$

Answer:

8