what is 7 bracket plus 2 square of 50 bracket braket 5 minus 2 square of 2 give you answer inform of a plus b square of 18 where a and b are integers

Answer 1

If you mean "bracket 7" instead of "7 bracket" and if you mean "square root" instead of "square", then:

(7 + 2√50)(5 - 2√2) = (7 + 2√25√2)(5 - 2√2) = (7 + 10√2)(5 - 2√2) = 35 - 14√2 + 50√2 - 40 = -5 + 36√2

-5 + 36√2 = -5 + 12(3√2) = -5 + 12√9√2 = -5 + 12√18 = a + b√18, where a = -5 and b = 12.

Answer 2

7{2√50 [(5-2√2)]} = 7 {2x5x√50 -2x2x√50x√2} =

7(10√50 -4√100) = 70√2x25 -28x10 = 70x5x√2 -280 = 350√2 - 280