Question

factor a^2b^2-7ab+10

Answer 1

What you should do in this case is to see the terms that are repeated in the expression.
 We have then that the terms are a and b.
 Making a common factor we have:
 a * b (a * b -7) +10
 Answer:
 The equivalent expression is:
 a * b (a * b -7) +10