Answer:
C. –87
Step-by-step explanation:
Given:
4x²–5x–7
Formula:
b²–4ac
Solution:
= (–5x)²–4(4x²)(–7)
= 25x²–4(–28x²)
= 25x²–112x²
= –87
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Answers & Comments
Answer:
C. –87
Step-by-step explanation:
Given:
4x²–5x–7
Formula:
b²–4ac
Solution:
b²–4ac
= (–5x)²–4(4x²)(–7)
= 25x²–4(–28x²)
= 25x²–112x²
= –87