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Mathematics 12 Online
OpenStudy (ineedhelpnow):

i need help solving (2x+5y)^2 here's my work: (2x)^2+2(2x)(5y)+(5y)^2 4x^2+20xy+25y^2

OpenStudy (amistre64):

looks good

OpenStudy (anonymous):

which equation represents a line through (-2,1) that is perpendicular to y=-5x+2?

OpenStudy (ineedhelpnow):

i'm just multiplying polynomials in two variables... my book is telling me that the answer is 4x^2+12xy+9y^2. i have no idea how they got that.

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