Finding the roots of a quadratic equation can be pretty easy once you understand how to do it! Here’s a step-by-step guide that really helped me when I was in Year 11 studying for my GCSEs.
Standard Form: First, make sure your equation looks like this: ( ax^2 + bx + c = 0 ). This way, it's easier to see what you're working with.
Identify Coefficients: Look at the numbers ( a ), ( b ), and ( c ). You need to find two numbers that multiply to ( ac ) and add up to ( b ).
Factorization:
Set Each Factor to Zero: After getting your factors, set each one to zero:
Solve for ( x ): Finally, solve for ( x ) in both equations. These answers are your roots!
For example, if you have the equation ( x^2 + 5x + 6 = 0 ), the numbers ( 2 ) and ( 3 ) fit perfectly. This leads to the factors ( (x + 2)(x + 3) = 0 ). So, the roots are ( x = -2 ) and ( x = -3 ).
Just keep practicing, and soon it will feel natural!
Finding the roots of a quadratic equation can be pretty easy once you understand how to do it! Here’s a step-by-step guide that really helped me when I was in Year 11 studying for my GCSEs.
Standard Form: First, make sure your equation looks like this: ( ax^2 + bx + c = 0 ). This way, it's easier to see what you're working with.
Identify Coefficients: Look at the numbers ( a ), ( b ), and ( c ). You need to find two numbers that multiply to ( ac ) and add up to ( b ).
Factorization:
Set Each Factor to Zero: After getting your factors, set each one to zero:
Solve for ( x ): Finally, solve for ( x ) in both equations. These answers are your roots!
For example, if you have the equation ( x^2 + 5x + 6 = 0 ), the numbers ( 2 ) and ( 3 ) fit perfectly. This leads to the factors ( (x + 2)(x + 3) = 0 ). So, the roots are ( x = -2 ) and ( x = -3 ).
Just keep practicing, and soon it will feel natural!