Suppose a = [-18 i] find an invertible matrix p and a diagonal matrix d so that a= pdp-1. use your answer to find an expression for a in terms of p, a power of d, and p-1 in that order. || (-64/7)^5 (-208/7)^5 || 3/7 217 a = (80/7)^5 (64/7)^5 -217 17

The side x is the hypotenuse of the triangle.

And we know that the leg that is labeled with a line is also 6.

Use the Pythagorean theorem and solve for x.

a² + b² = x²
3² + 6² = x²
9 + 36 = x²
45 = x²
√45 = x
√9×5 = x
√9√5 = x
3√5 = x

The answer is 3√5

Hope this helps :)