3 years ago

Given y=x2 + 9x + 20 find the zeroes.

Mathematics

1 answer:

Artyom0805 [142]3 years ago

3 0

Answer:

x=-5 x=-4

Step-by-step explanation:

y=x^2 + 9x + 20

We need to factor the equation

What 2 numbers multiply to 20 and add to 9

4*5 = 20

4+5 =9

y=(x+5) (x+4)

To find the zero's we set the equation equal to zero

0= (x+5) (x+4)

Using the zero product property

x+5 = 0 x+4=0

x=-5 x=-4

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Solve −3x2 + 30x − 90 = 0. x equals 5 plus or minus 2i square root of 5 x equals 5 plus or minus i square root of 5 x equals 10

Tcecarenko [31]

The x in your equation is 16/5 or 3 1/5 or 3.2 if you want it simplified

5 0

2 years ago

Read 2 more answers

Please help me with this math homework thanks :)

Ivenika [448]

Place a point at (0,-5) because that is the y-intercept (the -5 on the vertical line)

Since the slope is negative two which can be re-written as -2/1 (rise/run) you go down two and to the right once or up two and to the left once, it doesn't matter which. Another point can be placed at (1,-7) or (-3,-1), it still doesn't matter which.

Then you can draw a line connecting the two points.

I hope this helps :)

Let me know if you need further explanation