The answer would be -9 times -9 to get -81
if I'm mistaken then 9 times 9 would be 81
Answer:
a. 2x - 3
b. 7
Step-by-step explanation:
width = x
a. length = 2x - 3
b.
2x - 3 = 11
2x = 14
x = 7
The equation that has only one real number solution is
4a²x²+4abx+ b² = 0 and the solution is x = -b/2a where a, b, and c are real values.
<h3>What is a quadratic equation?</h3>
Any equation of the form Where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
As we know, the formula for the roots of the quadratic equation is given by:
If the quadratic equation has only one solution, then
or
2ax = - b
(2ax+b) = 0
(2ax+b)² = 0 (square on both sides)
Thus, the equation that has only one real number solution is
4a²x²+4abx+ b² = 0 and the solution is x = -b/2a where a, b, and c are real values.
Learn more about quadratic equations here:
brainly.com/question/2263981
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2.876 is rational. It can be expressed as 2876/1000.
-(sqrt(16)) is rational. It can be expressed as -4/1.
3pi is irrational. Pi cannot be expressed as a fraction.
23/40 is rational. It can be expressed as 23/40.
Have a nice day!