Find the indicated sum or difference. $$\left( - 3 z ^ { 2 } + 1 \right) + \left( 7 z ^ { 2 } - 1 \right)$$
A) $4 z ^ { 2 } + 2$
B) $13 z ^ { 4 }$
C) $4 z ^ { 4 }$
D) $4 z ^ { 2 }$
E) $10 z ^ { 2 }$

Question

Quizplus · Accepted Answer

We can simplify the expression by combining like terms: $$\left(-3z^2+1\right)+\left(7z^2-1\right)=(-3+7)z^2+(1-1)=4z^2$$ Thus, the answer is (D).

Find the Indicated Sum or Difference (−3z2+1)+(7z2−1)\left( - 3 z ^ { 2 } + 1 \right) + \left( 7 z ^ { 2 } - 1 \right)(−3z2+1)+(7z2−1)

Find the Indicated Sum or Difference $\left( - 3 z ^ { 2 } + 1 \right) + \left( 7 z ^ { 2 } - 1 \right)$