From their sum, the numbers are ' x ' and ' 8 - x ' .
From their product, x(8 - x) = 80 .
When you massage and manipulate this equation into the standard
quadratic form, you have
x² - 8x + 80 = 0 .
Applying the quadratic formula to tease out the solutions of this equation,
we find that they are
<em> x = 4 + 64 i</em>
and
<em> x = 4 - 64 i</em>
(q - 3/4)(q + 1/4)
First - q x q = q^2 ( q squared)
Outer - q x 1/4 = 1/4q
Inner - 3/4 x q = - 3/4q
Last - -3/4 x 1/4 = - 3/16
Add all in that order, combine like terms if necessary.
q^2 - 2/4q - 3/16
Answer:
c. 10
Step-by-step explanation:
Eliminate parentheses using the distributive property.
3(b+4) -2(2b+3) = -4 . . . . given
3b +12 -4b -6 = -4 . . . . . parentheses eliminated
-b +6 = -4 . . . . . . . . . . . . collect terms
-b = -10 . . . . . . . . . . . . . . subtract 6
b = 10 . . . . . . . . . . . . . . . . multiply by -1
_____
The rules of equality require that any operation you perform on one side of the equal sign must also be done on the other side. So when we say "subtract 6", we assume you know that means "subtract 6 from both sides of the equation", for example.
Answer:
70
Step-by-step explanation:
Answer:
8+5 and 8--5
Step-by-step explanation:
minus and minus is plus and 5+8 =8+5