Answer:
3
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
Radical roots occur as conjugate pairs
Given - 5 +
t is a root , then
- 5 -
t is also a root → a
x = -21
explanation: a trick i used was just do -3 times 7 and get my answer -21. if you are unsure if the answer is right just check your work with a calculator. -21 divided by 7 is -3 so -21 is the value of x. please mark brainliest !!