Question

Which expression is equal to the equation?

Answer 1

Answer:
`-11√(7)`

Explanation:

`2√(28)-5√(63)`

=
`2√(4*7)-5√(7*9)`

=
`2*√(4)*√(7) - 5*√(7) *√(9)`

=
`2*2*√(7) - 5*√(7)*3`

=
`4√(7) - 15√(7)`

=
`-11√(7)`

Answer 2

Answer:
`-11√(7)`

Explanation:

To find the expression equal to the given, we will simplify the original.

Given:

`\displaystyle 2√(28) -5√(63)`

Simplify:

`-11√(7)`

Answer:
`-11√(7)`