Question

(7 - 2√5)(5 + 4√5)

Answer 1

(7*5) + (7*(4√5)) + ((-2√5)*5) + ((-2√5)*(4√5)) Then your almost there.

Answer 2

Would the beginning of the answer be 35 + ?

Answer 3

7*5=35, yes.
Solve each of the ( ) individually, then add them together.
You see what i did to (7 - 2√5)(5 + 4√5), right?

Answer 4

Yes, thank you.

Answer 5

\[7(5+4\sqrt{5})-2\sqrt{5}(5+4\sqrt{5})\]

Answer 6

\[35+28\sqrt{5}-10-40\]

Answer 7

\[28\sqrt{5}-15\]

Answer 8

ok @tadhanala

Answer 9

Wouldn't it be 35 + 10√5?

Answer 10

no

Answer 11

@jiteshmeghwal9 am i right?

Answer 12

sorry... @mayankdevnani no :(

Answer 13

18√5 -5 is what i got. it's almost 35,25 if rounded upwards.

Answer 14

you forgot it's 35-40 @jiteshmeghwal9

Answer 15

ohh..yeah

Answer 16

18sqrt{5}-5