Question

1) (5+√7)(2+√5)
ii) (5+√5)(5-√5)
iv)(√3+√7)²
iii) √11-√7)(√11+√7)
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Answer 1

Step-by-step explanation:

1.) 5 + √7 into 2 + √5

5*2+5*√5+√7*2+√7*√5

10 + 5√5+ √7*2 + 35

=40 + 5√5 + √7*2

2.) [5 + √5] into [5 - √root 5]

5^2 - √5^2 ( a-b*a+b a^2 - b^2)

25 - 5

=20

3) 3 + 7 + 2√3√7

=10 + 2√3√7

4.) 121 - 7

= 114

Answer 2

Step-by-step explanation:

ii) (5-√5)^2

iv) √3^2 + 2×√3×√7+ √7^2

iii)( 11- √7)^2

1) (5+√7)(2+ √5) multiply it...