Question

The expression (2√8 +3√5 -7√2) (√72 – 5√20 -2√2), reduces to :
please answer​

Answer 1

Answer:

42√10 - 174

Step-by-step explanation:

2√8 = 2√(4x2) = 4√2

√72 = √( 9×8) = 3 √ 4×2 =6 √2

5√20 = 5√5×4 = 10√5

(2√8 +3√5 -7√2) = 4√2 + 3√5 - 7√2

= -3√2 + 3√ 5

= 3√5 - 3√2

(√72 – 5√20 -2√2) = 6√2 - 10√5 -2√2

= 4√2 -10√5

(2√8 +3√5 -7√2) (√72 – 5√20 -2√2)

= (3√5-3√2) (4√2-10√5)

= 12√10 - 150 - 24 + 30√10

= 42√10 - 174

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Answer 2

Answer:

above ans. correct...!