exam Maths Puzzle Numerical Ability

Could someone please show me how to simplify by combining like terms. I am not sure how you combine the sqrt of this equation.
sqrt 63 - 2 sqrt 28 + 5 sqrt 7

Read Solution (Total 0)

exam Other Question

Perform the indicated multiplication. Then simplify each radical expression.

6-sqrt20
________
2

Your help will be appreciated very much. Thank you.
Indicate which of the following sets of lines are parallel, perpendicular, or neither.

y=2x-5
y=2x+5


3x+y=5
-x+3y=6


3x+y=5
x+y=3