Question

heya!!

expand the brackets and simplify the surd:

1. (7root over5 + 2 )(root over 5 + 4)

2. (1 - 3root over7)(6 - 3root over7 )

Answer 1

$\bold {\huge {Ello !!}}$

Here's your answer

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• Simplifying the following :-

1. ( 7√5 + 2 ) ( √5 + 4 )

= √5 ( 7√5 + 2 ) + 4 ( 7√5 + 2 )

= 7 × √5 × √5 + 2 × √5 + 4 × 7√5 + 4 × 2

= 35 + 2√5 + 28√5 + 8

= 43 + 30√5

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2. (1 - 3√7) (6 - 3√7)

= 1 (6 - 3√7) - 3√7 (6 - 3√7)

= 6 - 3√7 - 18√7 + 9 × 7

= 6 + 63 - 21√7

= 69 - 21√7

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Hope it helps you dear!

Answer 2

This is the answer to your question