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Mathematics 16 Online
OpenStudy (anonymous):

(a+b)(a+6b)

OpenStudy (texaschic101):

I usually use the FOIL method for solving problems like this.. FOIL --- first,outside,inside,last (a + b)(a + 6b) first -- multiply 1st terms in each set...a * a = a^2 outside -- multiply outside terms in each set...a * 6b = 6ab inside -- multiply inside terms in each set ...a * b = ab last -- multiply last terms in each set...b * 6b = 6b^2 now put them together.. a^2 + 6ab + ab + 6b^2 -- combine like terms a^2 + 7ab + 6b^2

OpenStudy (anonymous):

so that would be my answer but everytime i do foil i get it wrong

OpenStudy (anonymous):

(4x−3y2)(2x+y2) wat about this idid it i want to be sure cause im doing a test

OpenStudy (texaschic101):

you can also do it this way... (a + b)(a + 6b) -- multiply everything in the first parenthesis by everything in the second parenthesis a (a + 6b) = a^2 + 6ab b (a + 6b) = ab + 6b^2 now put them together a^2 + 6ab + ab + 6b^2 -- combine like terms a^2 + 7ab + 6b^2

OpenStudy (texaschic101):

(4x - 3y^2)(2x + y^2) first -- 4x * 2x = 8x^2 outside -- 4x * y^2 = 4xy^2 inside -- -3y^2 * 2x = 6xy^2 last -- -3y^2 * y^2 = -3y^2 put it all together 8x^2 + 4xy^2 + 6xy^2 - 3y^2 -- combine like terms 8x^2 + 10xy^2 - 3y^2

OpenStudy (anonymous):

(x+2y2)(2x−2y2) @texaschic101

OpenStudy (texaschic101):

(x + 2y^2)(2x - 2y^2) first ... x * 2x = 2x^2 outside ... x * -2y^2 = -2xy^2 inside ... 2y^2 * 2x = 4xy^2 last ... 2y^2 * -2y^2 = -4y^4 put them together 2x^2 - 2y^2x + 4y^2x - 4y^4 -- combine like terms 2x^2 + 2y^2x - 4y^4 -- rearrange -4y^4 + 2xy^2 + 2x^2 ================ I messed up on the one before this... last ... 3y^2 * y^2 = 3y^4 so the answer would be : 8x^2 + 10xy^2 - 3y^4 -- rearrange -3y^4 + 10xy^2 + 8x^2

OpenStudy (anonymous):

its wrong

OpenStudy (anonymous):

(2a2+3b)(2a2−2b) @texaschic101

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