Iâm having trouble figuring out when to factor and when to use the quadratic formula.
QUADRATIc ONS. Solve the tollowing equations using tactoring for the first three, and the quadratio formala for all the othersi In each case, one ansver is given (to three figures).Determine the other ansver. Note: i-- 1. x22x 15- 2 2 3x2 -7 30 3. 3x2 15x 108 4. Ð.6x2 + 3.5x- 12.9-0 s. 5 x2 10ax 25 a2- 1. 3, 2. 6 3. 9, 4. 2.56 5. 3.45 a. 6. ±2.05, 6.3x4-18.5x2-33.4-0 HINT: Let y-x2. 6. 7.-1.25+12.44 8-1.01, 9-5+15 7, 2x2 + 5x + 15-0 8. 7.6x2 16.5x+24.3- 9. 0.1x2 + x + 5 =0 10. 1.56 x2 2.55x +6.77- 10. -0.817 +i1.92,_