Q. Solve the equation by factoring:30x2−48x−3x3=0Answer: x=
Factor GCF: Given the equation: 30x2−48x−3x3=0First, we should factor out the greatest common factor (GCF) which is 3x in this case.3x(10x−16−x2)=0
Rearrange Terms: Now we need to rearrange the terms inside the parentheses to make it easier to factor.3x(−x2+10x−16)=0
Factor Quadratic: Next, we factor the quadratic expression inside the parentheses. This is a quadratic in the form of ax2+bx+c, where a=−1, b=10, and c=−16. We are looking for two numbers that multiply to a∗c (−1∗−16=16) and add up to b (10). The numbers that satisfy this are 8 and 2 because a=−10 and a=−11. So we can write the quadratic as: a=−12
Group Terms: Now we group the terms to factor by grouping. 3x[(−x2+8x)+(2x−16)]=0
Factor Common Factors: Factor out the common factors from each group.3x[−x(x−8)+2(x−8)]=0
Set Equations: Now we can see that (x−8) is a common factor.3x(x−8)(−x+2)=0
Solve for x: We can now set each factor equal to zero to solve for x.3x=0 or (x−8)=0 or (−x+2)=0
Solve for x: We can now set each factor equal to zero to solve for x.3x=0 or (x−8)=0 or (−x+2)=0Solving each equation for x gives us the solutions.For 3x=0, x=0.For (x−8)=0, x=8.For (−x+2)=0, x=2.
More problems from Solve complex trigonomentric equations