Question

Please help . tjjhhhhhhhh

Answer 1

D

Explanation:

note that (
`√(3)` )² = 3

Given

(- 4 +
`√(3)` )² = (- 4 +
`√(3)`)(- 4 +
`√(3)`)

Expand using (a + b)² = a² + 2ab + b²

= (- 4 )² + 2(- 4
`√(3)` ) + (
`√(3)` )²

= 16 - 8
`√(3)` + 3

= 19 - 8
`√(3)`

Answer 2

19 - 8√3

Explanation:

(-4 + √2)^2

= (-4)^2 + 2(-4)(√3) + √3)^2

= 16 - 8√3 + 3

= 19 - 8√3