Question

Which choice is equivalent to the expression below?
6√7 - 5X√7 - X√7

A.-2√7
B. 0
C.-X^2
D.6V7-6X√7

Answer 1

$6\sqrt7-5x\sqrt7-x\sqrt7=6\sqrt7-6x\sqrt7\\\\Answer:D.$

Answer 2

$6\sqrt7 - 5x\sqrt7 - x\sqrt7=\\ 6\sqrt7-6x\sqrt7 \Rightarrow D$