Solve the simultaneous equations algebraically: y = x+19 AND y = x^2 + 4x +1.

We have one linear and one quadratic equation here. Since we have a quadratic, we will have two sets of solutions. Let's solve by substitution. Substitute equation (1) into equation (2), which yields:x + 19 = x^2+4x+1OR 0 = x^2 + 3x - 18To solve this quadratic to find our x values we must first factorise, which gives:0 = (x+6)(x-3)It must follow that:x = -6 OR x = 3.Sub these two distinct real solutions into equation 1, we will get our corresponding y value:x = -6, y = 13 OR x=3, y=22.

LD
Answered by Liam D. Maths tutor

4101 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve x^2 -4x=12


Solve the simultaneous equation: (16^x)/(8^y)=1/4 and (4^x)(2^y)=16


Trigonometry: what is it, and how do I do it?


Find the values of x when x^2-6=x


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