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