461,929 views
4 votes
4 votes
2. 5x2 + 16x - 84 = 0
Helppp please

User Srijith Vijayamohan
by
3.1k points

2 Answers

13 votes
13 votes

Answer:

2.8, –6

Explanation:

The equation is already instandard form. Use the quadraticformula.5x2+16x−84=0x=−b±b2−4ac√2aSubstitute 5 for a, 16 for b,and −84 for c. Solve to getx=2. 8 or x=− 6.

User Spheenik
by
2.7k points
11 votes
11 votes

Answer:

the x would equal 25 as 5x2 is 10 + 16x25 - 84 is 0.

Explanation:

User Tan Kucukhas
by
3.1k points