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3x^2=-20 so x^2=-20/3 this has no real roots but the plus of minus i(square root of 20/3) is a solution if we allow complex numbers.
20 = 400
To solve this one, subtract 50 from 180 and you'll have your answer.
Yes.
205
A equals 20.
(3x-4)(x+5)
(20 - x)/5
20
To solve for x, we'd have to know what this expression equals.
y=16 x= -4
-7m + 20 = -17m - 1010m = -30m = -3
68
-3x + 5 = 20 -3x = 15 x = -5
Better formatting is cos(2x+20)=-0.5
(x + 4)(3x - 5)
(3x - 5)(x + 4)