Question

Y=x square +2x -4
where
X is a
number less than even number to 8​

Answer 1

Answer:

First things first. The x intercept is where the line crosses the x axis when y=0. So set y to equal 0 and solve:

0= -x^2+2x+5 We'll factor:

(x + )( -x + ) Now the only numbers that we can multiply to get 5 are 1 and 5, and they don't add or subtract to equal 2, so we either have to complete the square or use the quadratic formula to factor this. You also have the option of multiplying everything by -1 to get rid of that -1 coefficient in front of the x^2, so we can rewrite it as 0=x^2-2x-5. Now personally, I suck at both the quadratic equation and completing the square, so I'm going to leave you a link that's very good at explaining both procedures. After you factor, you'll have 2 values for x, which is ok because your graph is a parabola, and therefore your line will cross the x axis twice

Answer 2

Answer:

1. -2

Step-by-step explanation:

• -4 / 2
• -2
• $e\% log(e)$