The #2's after the letter s below represent squared. Not sure how to post it so it looks that way. Let me know if im doing this one right please.
9m2 -2mn + 5n2 - 9 (5m2 + 6mn - 8n2)
Step 1: Work whats in parenthesis (multiply)
-9 x 5m2 = -45m2 -9 x 6mn = -54mn -9 x 8n2 = -72n2
leaving: 9m2 - 2mn + 5n2 -45m2 - 54mn - 72n2
Step 2: combine like terms
9m2 + -45m2 = -36m2 -2mn + - 54mn = -56mn 5n2 + 72n2 = 77n2
Answer: 54m2 - 56mn +77n2
Comment on this one please....
Mr.H
ok thank so it should look like this than
Simplify: 9m2 -2mn + 5n2 - 9 (5m2 + 6mn - 8n2)
Step 1: Step 1: Work whats in parenthesis (multiply)
a) -9 x 5m2 -45m2
b) -9 x 6mn -54mn
c) -9 x 8n2 -72n2
Step 2: combine like terms
a) 9m2 + -45m2 -36m2
b) -2mn + - 54mn -56mn
c) 5n2 + 72n2 + 77n2
Step 3:
Answer -36m2 - 56mn + 77n2
Correct? I used the = previously just to show my work via the posting wouldnt have really done that on paper but i understand what you mean. I just wasnt sure how someone would be reading it on here.
Mr.H
Your result is correct
With my remark about the use of the "=" sign in my previous post I only wanted to point out that the "=" sign is used to state that both sides are equal. If you use the "=" sign to finish a step of calculations then the values on both sides are not equal and the "=" sign shouldn't be used.
To write a power use this ^ sign: 4^3 = 64