Recent content by qdv

I am learning how to solve a matrice using cramer's rule, and not sure if this is the correct answer. Solve the following systems of equations x - y + 3z = 8 3x + y - 2z = -2 2x + 4y + z = 0 so I figured out the solution is x = 1, y = -1, z = 2 but is this equation consider a...

for the first one I figured it out to plus 12 also, but when I check the solution it is -12, so i guess the book is wrong. I understand about function now thanks

u should try factoring first, it's easier if it work, if not use the quadratic equation

Hi i am new here, and just wondering if my answers are right, please check for me. 1. Evaluate g(x) = x^2 + x g(x + 3) my answer: x^2 + 7x -12 2. Function or not: x^2 = y - 3 I say not a function. 3. y^2 = x - y I would say yes this is a function. thanks a lot