Solve the equation 3x squared + 4x – 12 = 0 Give your solutions correct to 2 decimal places.
3x2 +4x-12=0
Step 1: formula (-b+/- square root (b2-4ac))/2a
Step 2: a=3 b=4 c=-12
Step 3: type into your calculator
Step 4: answer 1.44, or -2.77
JY
Related Maths GCSE answers
All answers ▸Factorise x^2 −x−12
Use these 2 simultaneous equations to find x & y: 5y+21=9x and 6x+7y=45
Solve the following equation by factorisation: x^2 - 2x -15 = 0
A shopkeeper compares the income from sales of a laptop in March and in April. The price in April was 1/5 more than in March. The number sold in April was 1/4 less than in March. By what fraction does income decrease from March to April?