Linear Simultaneous Equations - Substitution (Edexcel A-Level Mathematics): Quizzes

Rearrange one equation, substitute into other

Rearrange one equation to isolate a variable

$y^2 - 10y + 25$

$y^2 - 5y + 8 = 0$

$y=7$ or $y=4$

$-1$

Two

$4x^2 - 6x - 10$

$4x^2 + 4x + 1 = 0$

$(2x+1)^2$

The line is a tangent to the curve

A line that touches curve without cutting