Answer:
??? Ok so whats the question??
Step-by-step explanation:
Answer:
-7
Step-by-step explanation:
The Discriminant = b²-4ac
1.
a=2
b= 5
c=-3
The Discriminant is 49
When a, b and c are real numbers, a ≠ 0 and discriminant is positive and perfect square, then the roots α and β of the quadratic equation ax2 + bx + c = 0 are real, rational unequal.
2.
a=-1
b=1
c=1
The Discriminant is 5
When a, b and c are real numbers, a ≠ 0 and discriminant is positive but not a perfect square then the roots of the quadratic equation ax2 + bx + c = 0 are real, irrational and unequal.
3.
a=1
b=6
c=11
The Discriminant is-8
then the roots α and β of the quadratic equation ax2 + bx + c = 0 are unequal and imaginary.
4.
a=9
b=-54
c=81
The Discriminant is 0
the roots α and β of the quadratic equation ax2 + bx + c = 0 are real and equal.
Answer: He will be charged <u><em>$915 in interest after 3 years</em></u>
Step-by-step explanation:
7% ÷ 100 = 0.07
0.07 × 4500 = 315
315 × 3 = 945
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945 + 4500 = 5445 ( Don't worry about this)