Solving quadratic equationsIB MYP Maths Extended: Mind map

Exam questions on Solving quadratic equations

1. A quadratic equation is $x^2-5x-14=0$.
   Write down the coordinates of the points where the graph of $y=x^2-5x-14$ crosses the $x$-axis.2 marks
2. A ball is thrown upwards from a platform. Its height $h$ metres above the ground after $t$ seconds is modelled by $h=-5t^2+10t+15$.
   Solve $-5t^2+10t+15=0$ by factorising, and hence state how long the ball takes to hit the ground.2 marks
3. Consider the quadratic equation $3x^2-4x-5=0$.
   Use the quadratic formula to solve the equation. Give your answers correct to 3 significant figures.3 marks