Question

3✓5-5✓2* 4✓5+3✓2 find the answer it is of class 9 maths chapter 1​

Answer 1

Step-by-step explanation:

Given:-

3✓5-5✓2* 4✓5+3✓2

=>(3✓5-5✓2) × (4✓5+3✓2 )

=>3✓5(4✓5+3✓2 )-5✓2(4✓5+3✓2 )

=>[(3×4×√(5×5)+(3×3×√(5×2)]-

[(5×4×√(2×5)+(5×3×√(2×2)]

=>(12×5)+(9×√10)-20√10-(15×2)

=>60+9√10-20√10-30

=>(60-30)+(9-20)√10

=>30+(-11)√10

=>30-11√10

3✓5-5✓2* 4✓5+3✓2 =30-11√10

Answer 2

Step-by-step explanation:

$(3 \sqrt{5} -5 \sqrt{2} )(4 \sqrt{5} + 3 \sqrt{2})$

$3 \sqrt{5} (4 \sqrt{5} + 3 \sqrt{2}) - 5 \sqrt{2}( 4 \sqrt{5} + 3 \sqrt{2})$

$60 + 9 \sqrt{10} - 20 \sqrt{10} - 30$

$= 30 - 11 \sqrt{10}$

Therefore , it is the answer.

I hope it helps you. If you have any doubts, then don't hesitate to ask.