Question

the like terms of the following are (a) ab,9ba (b) ab,5b (c) -5b,9bc (d) none of this​

Answer 1

Answer:

Liberal Arts Math

show work

simplify:(a-9b)(a+3c)

(a-9b)(a+3c)

a^2+3ca-9ba-9bc

I'm pretty sure this is how you do it... plz check

some standard formula to remember are;

i: (a+b)^2=(a+b)(a+b)= a^2+2ab+b^2

ii: (a-b)^2=(a-b)(a-b)=a^2-2ab-b^2

iii: (a+b)(a-b)= a^2-b^2

look at the patern and work out the logic behind it.

ACTUALLY the logic is ( try to follow);

Given (a+b)(c+d)

the workflow is as follows

a*c +(b*c + a*d)+ bd

e.g. (a+b)(c-d)

NOW IF U HAVE -VE signs, THE TRICK IS TO REMOVE IT ,

(a+b)(c+[-]d)

and u keep the workflow the same as above;

=a*c +(b*c + a*[-]d)+ b*[-]d

=ac +(bc -ad) -bd

u can keep expanding.

HOPE THIS HELPED U