Answer:
c²=a²+b²-2bx
Step-by-step explanation:
Given,
h²=a²-x²
We need to plug this equation into
c²=h²+b²-2bx+x²
We can replace h² and we get
c²=a²-x²+b²-2bx+x²
Now， we can cancel the terms
c²=a²+b²-2bx
So we get after simplification as
c²=a²+b²-2bx
