Question

subtract. (0.9a^3+0.2a-5)-(0.7a^4-0.3a-0.1)

Answer 1

(0.9a^3+0.2a-5)-(0.7a^4-0.3a-0.1)
remove the parentheses , the signs inside second parentheses change because of the '-' outside it
= 0.9a^3+0.2a-5- 0.7a^4+0.3a+0.1
bring like terms together
= 0.9a^3 - 0.7a^4 +0.2a + 0.3a - 5 + 0.1
now you can add terms in 'a; and numbers
can u finish this off?

Answer 2

yes thank you

Answer 3

yw