### Day 25 - Factoring Difference of Squares - 09.22.14

 Bell RingerPolynomials and Factoring Test on Friday!Simplify. (2x3y)4((-2y)2)3512x12y1064x10y81024x12y121024x12y10none of the aboveFactor the following polynomial: n2 - 81(n + 9)(n - 9)(n + 9)2(n - 9)(n - 9)prime polynomial; cannot be factorednone of the aboveSolve the following equation by factoring: n2 - 81 = 0n = -9, 9n = 0, -9n = 0, 9all of the abovenone of the aboveFactor the following polynomial: a2 - 9a - 52(a - 13)(a - 4)(a + 13)(a + 4)(a + 13)(a - 4)(a + 13)(a + 3)none of the aboveSolve the following equation by factoring: a2 - 9a - 52 = 0a = 13, -4a = -13, -4a = 13, 4a = -13, 4none of the above ReviewMonomialsPolynomialsAdding/Subtracting PolynomialsMultiplying Polynomials by MonomialsMultiplying Polynomials by PolynomialsSpecial ProductsIntro to FactoringFactoring x2 + bx + cLessonCheckpoint Sheets ProtocolFactoring ax2 + bx + cConceptsFactoring when a, b, and c have a Common FactorPrime PolynomialsSolving Equations by FactoringSection 9-4Practice #5-9 (odds)Checkpoint 1 - #4, 6, 8Practice #15-31 (odds)Checkpoint 2 - #26, 28, 30Practice #35-47 (odds)Checkpoint 3 - #36, 42, 44, 46, 48Factoring Differences of SquaresConceptsa2 - b2 = (a + b)(a - b)Factoring Out a Common FactorGrouping Term with Common FactorsSection 9-5Practice #5-9 (odds)Checkpoint 1 - #8, 10Practice #11, 13Checkpoint 2 - #12, 14Practice #17-33 (odds)Checkpoint 3 - #18, 30, 32Practice #35-45Checkpoint 4 - #38, 42, 44Perfect Squares and FactoringConceptsPerfect Square TrinomialsSquare Root PropertySection 9-6Practice #7-11Checkpoint 1 - #8, 10Practice #13, 15Checkpoint 2 - #12, 14Practice #23Checkpoint 3 - #24Practice #25-39Checkpoint 4 - #36, 38, 40Practice #43-53Checkpoint 5 - #48, 50, 52Exit TicketPosted on the board at the end of the block Lesson Objective(s)How can expressions of the form ax^2 + bx + c be factored?Standard(s)Mathematical Practice(s)#1 - Make sense of problems and persevere in solving them#2 - Reason abstractly and quantitatively#3 - Construct viable arguments and critique the reasoning of others#6 - Attend to precision#7 - Look for and make use of structure