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Both sin4x and sin6x tend to 0 as x tends to and so their product must also tend to 0.
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2sin2(6x) + 3sin(6x) + 1 = 0 Solving the quadratic, sin(6x) = -1 or sin (6x) = -0.5 sin(6x) = -1 => 6x = 45+60n degrees for integer n sin(6x) = -0.5 => 6x = 35+60n or 55+60n degrees for integer n.
6x+13 is just 6x+13 you can not combine the terms because they are not like terms. ifyou make this expression equal a value... lets say 1 then you can find a value for "x" 6x+13=1 6x+13-13=1-13 6x=-12 x=-2
10
-6x^2 - 78x - 252 Improved answer: -6x+6x+7 When simplified = 7
x=1.5 and y=6x so y=6(1.5) y=9