Answer:
(-2, 0)
Step-by-step explanation:
Focus on the given equation: y=2x^2-x-10. Here the coefficients are a = 2, b = -1 and c = -10.
Then the roots (closely related to x-intercepts) are
-b plus or minus sqrt(b^2 - 4ac)
x = ------------------------------------------------
2a
or, specifically for the problem at hand,
-(-1) plus or minus sqrt([-1]^2 - 4[2][-10]
x = -------------------------------------------------------- = 5/2 (same as 2.5 in (2.5,0) )
2[2]
1 plus or minus sqrt(81)
= ---------------------------------------
4
1 plus 9 1 minus 9
= ------------- or ------------------- => 10/4 or 5/2 OR -8/4 = - 2
4 4
One x-intercept is given: (2.5, 0).
The other is (-2, 0)
I dont get what the letter mean what goes with each thing
Answer:
no
Step-by-step explanation:
no
The two numbers are 22 and 7.
22 + 7 = 29
22 - 7 = 15
here is how we can find these numbers;
let a and b are two numbers
a + b = 29
a - b = 15
a = 15 + b
now put this value of a in any of the equation
a + b = 29
15 + b + b = 29
15 + 2b = 29
2b = 29 - 15
2b = 14
b = 7
now put the value of b to find the value of a;
a = 15 + b = 15 + 7 = 22
a = 22
I think the answer is 1x+3=7
