Since you already know that x is equal to -5, you just need to plug it in to get y. You should get that y= -8.
(-5, -8)
Can't understand. What part is the question?
Answer:
The zeroes are and
On the graph, each of these zeroes represent the x-value where the equation will intersect with the x-axis.
Step-by-step explanation:
We have the quadratic equation
To factor this we need to find two numbers that fulfill the following:
They add up to 1
They multiply to give you -20
These two numbers are -4 and 5
This means that the quadratic equation in its factored form will be:
Now that we have the factored form, we need to set and solve for x
From this factored form, we can see that when and the result will be zero. Just to check we can plug in each of these x values
The result of this confirms that x=4 and x=-5 are indeed the zeroes of this equation.
Each of these zeroes represent the x-value where the equation will intersect with the x-axis.
Firstly, subtract 3 on both sides of the equation:
Next, divide by a:
Lastly, square root both sides, and your answer will be