Question

Hi! need help asap xx

Answer 1

C) x = 6

because this is a right triangle

=> we have:

(12² + x²)(3² + x²) = (15x)²

<=> 1296 + 153x² + x⁴ = 225x²

<=> x⁴ - 72x² + 1296 = 0

<=> (x² - 36)² = 0

<=> x² = 36

=> x = 6

Answer 2

C

Explanation:

The 3 triangles are all similar.

Using the 2 inside then the ratios of corresponding sides are equal, that is

`(x)/(3)` =
`(12)/(x)` ( cross- multiply )

x² = 36 ( take the square root of both sides )

x =
`√(36)` = 6 → C