Question

w.4 add and subtract polynomials 5ek
subtract.
$(6j^{2} + 8) - (-2j^{2} + 9)$

Explanation:

Step1: Distribute the negative sign

$(6j^2 + 8) + 2j^2 - 9$

Step2: Combine like $j^2$ terms

$6j^2 + 2j^2 + 8 - 9 = 8j^2 + 8 - 9$

Step3: Combine constant terms

$8j^2 + (8 - 9) = 8j^2 - 1$

Answer:

$8j^2 - 1$