1) x^2=64 is the same as x=the root of 64 which gives us: (+-)8
2) here you must us pq-formel as:
5m^2-5m=60
5m^2-5m-60=0
(m^2-5m-60)/5=0
m^2-m-12=0
m=0,5(+-) the root of 0,25+12
m=0,5(+-)3,5
m1=0,5+3,5
m2=0,5-3,5
15) x^2=7x
x^2-7x=0 here there is two x, so:
x(x-7)=0
x1=0
x2=7
<span>
Here you can only use PQ formula in all the others, just as I did in the question number 2</span>
Answer:
x = -
Step-by-step explanation:
Given
(x - 9) = - 11
Multiply both sides by 3 to clear the fraction
2(x - 9) = - 33 ← distribute left side
2x - 18 = - 33 ( add 18 to both sides )
2x = - 15 ( divide both sides by 2 )
x = -
Answer:
28
Step-by-step explanation:
24x1.10=28
We need to find a clever way to break up 19pi/12 into two different values. We want the two values to be special angles.
We want the two values to divide into 12 so we can simplify the fractions. One option is to break 19 into 4 and 15.
simplifying our fractions,
Apply your Tangent Angle Addition Identity,
simplify each thing using your unit circle,
multiply by conjugate of the denominator to rationalize,
expanding the numerator,
dividing each term by -2 as a final step,
I hope that helps!