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Solve the equation 3x squared + 4x – 12 = 0 Give your solutions correct to 2 decimal places.

3x+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

Jin Yang Q. 13 plus  Maths tutor, GCSE Maths tutor, 11 Plus Maths tut...

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