Answer:
x^2= 17^2-8^2
Step-by-step explanation:
just do reverse PEMDAS on the Pythagorean Theorem
x² = 17² - 8²
Pythagoras theorem
Diagonal ² = length² + width²
Rearrange to get length in its own
Length ² = diagonal ² - width²
Replace length with x, diagonal with 17 and width with 8
