If ax2+bx+c is divided by x+3, x-5, and x-1. the remainders are 21, 61 and 9 respectively. Find a,b and c. (Gaussian elimination method.)

If $a x^{2} + b x + c$ is divided by x+3, x-5, and x-1. the remainders are 21, 61 and 9 respectively. Find a,b and c. (Gaussian elimination method.)

Mixed-up sentence exercise

Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.