IDNLearn.com is the place where your questions are met with thoughtful and precise answers. Explore thousands of verified answers from experts and find the solutions you need, no matter the topic.

If P = a^2 + a - 1 and R = –a - 1, which expression represents P + R
a) a^2 + 2
b) a^2 - 2
c) a^2 + 2a
d) a^2 + 2a - 2