3x^2-8=5x solve using quadratic equation
2 answers:
Answer:
x = -1 or x = 8/3
Step-by-step explanation:
3x² - 8 = 5x
3x² - 5x - 8 = 0
3x² - 8x + 3x - 8 = 0
(Here you find two numbers which have a sum of -5 and a product of 3×-8= -24. These two numbers are -8 and 3. -8 + 3 = -5 and -8 × 3 = -24.)
(3x² - 8x) (3x - 8) = 0
x(3x - 8) +1(3x - 8) = 0
(x + 1) (3x - 8) = 0
x + 1 = 0 OR 3x - 8 = 0
x = -1 3x = 8
x =
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Answer:
The coordinates of point b are (-5,5).
Step-by-step explanation:
Given:
Point a is at (-7,-7) and m is at (-6,-1).
So, to find the coordinates of point b.
Let a (-7,-7) be , m (-6,-1) and b
.
Now, putting the formula to get the coordinates:
⇒
So, here we will make two equations to find the value of :
multiplying both sides by 2
⇒
⇒
And, now same method for getting the value of .
multiplying both sides by 2
⇒
⇒.
The value of =
.
Therefore, the coordinates of point b are (-5,5).