Please help, I do not understand my math homework and I need help with these to solve them...please help!

1. Solve: a) x+ 4x = *-2* - 17x -5 b) 2 (x +3 ) - 5 (x+3) 4 2 . Solve : - 4.9+ + 9.8+ + 73.5 =0 (4) 4 3. Are *=3 and * = -4 THE SOLUTION TO THE EQUATION X- 7X +12=0? Explain, How Do you know? 2 C) 4. IF you NEED TO FIND THE EQUATION OF A PARABOLA FROM ITS GRAPH, WHAT DO YOU NEED TO KNOW IN ORDER TO USE: C ) a ) y = a ( x - r ) ( x - s ) 2 b ) y = a ( x - h ) + k 5 . DETERMINE THE EQUATION OF A QUADRATIC FUNCTION IN STANDARD FORM IF IT HAS X-INTERCEPTS - 2, - 5 AND Y-INT. - 10