318 MCGRAW-HILL’S SAT
Concept Review 5: Factoring
- What does it mean to factor a number or expression?
- Write the four basic factoring formulas for quadratics. _____
- What is the zero product property?
- Write the prime factorization of 108. 4. ___
- Find the least common multiple of 21mnand 75n^2. 5. ___
- Find the greatest common factor of 108x^6 and 90x^4. 6. ___
Factor and check by FOILing: FOIL:
- 1 − 49 x^4 10.
- m^2 + 7 m+12 11.
- 16x^2 − 40 x+25 12.
Solve by factoring and using the zero product property. (Hint: each equation has two solutions.)
- 4x^2 = 12 xx= or 14. x^2 − 8 x= 33 x= or
- If 3xz− 3 yz=60 and z=5, then x−y=___
325
2
()x−xx
21
35
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()yy+^33 ()−