Question 71205
USEING THE FOIL TECHNIQUE MULTIPLY THE FIRST TERMS, THEN THE OUTER TERMS, THEN THE INNER TERMS &THEN THE LAST TERMS. 
(3x+5)(4x-1)=12x^2-5+20x-3x COMBINE LIKE TERMS.
12x^2+17x-5
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y=-4 is a verticle line through the point y=-4.
{{{ graph( 300, 200, -6, 5, -10, 10, y = -4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = -4). 
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(-3a^2b^5)^2=(-3a^2b^5)(-3a^2b^5)=9a^4b^10
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(x-4)^2=(x-4)(x-4)=x^2-4x-4x+16=x^2-8x+16
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