Question

maths 9th class question ​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

(i)

(5+√5)(5-√5)

We know that-

(a+b)(a-b)=a²-b²

so this would be -

[(5)²-(√5)²]

[25-5]=20 Ans.

(ii)

(√3+√2)²

(a+b)²=a²+b²+2ab

= (√3)²+(√2)²+2×√3×√2

=3+2+2√6

=5+2√6 Ans.