Question

Simplify √63 - 5√28 + 11√7.

a) 4√7
b) 5√7
c) 6√7
d) None of the above.

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Answer 1

Answer:

a) 4√7

Step-by-step explanation:

Answer 2

√63 - 5√28 + 11√7

= √9 × 7 - 5 √ 4 × 7 + 11√7

= 3√7 - 10√7 + 11√7

= -7√7 + 11√7

= 4√7