Find the coordinates of the two points where the lines y=x²+4x+6 and y=x+4 meet.

To solve these equations we must make them equal to eachother. This gives us x2+4x+6=x+4, we must then subtract the 'x+4' from both sides to give us an equation that equals 0. This gives us the following equation x2+3x+2=0. To solve this we can factorise it which gives us (x+1)(x+2)=0. To find the values of x we must make each bracket equal to 0 so we get x+1=0 -> x=-1 and x+2=0 -> x=-2. Now we have our values for x, we must find the y values, this can be done by substituting each x -value into our y equation (y=x+4). For x=-1, we get y=(-1)+4 -> y=3 so our coordinate is (-1,3), and for x=-2, we get y=(-2)+4 -> y=2 so our coordinate is (-2,2).

GH
Answered by Gaby H. Maths tutor

3263 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The equation of line L1 is y=3x-5. The equation of line L2 is 2y-6x+5=0. Show that these two lines are parallel.


Nadia has £5 to buy pencils and rulers. Pencils are 8p each. Rulers are 30p each. She says “I will buy 15 pencils. Then I will buy as many rulers as possible. With my change I will buy more pencils.” How many pencils and how many rulers does she buy?


There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.


Find all of the roots of the equation y = 3x^3 - 12x


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning