Question
Which one of the following is a non-metal that is liquid
at room temperature?Solution
Bromine is the only non-metal that is liquid at room temperature. It appears as a reddish-brown, fuming liquid with a strong, irritating odor. Unlike most non-metals, which are gases (like oxygen and nitrogen) or solids (like sulfur and carbon) at room temperature, bromine is liquid, making it unique.
If (a + b) = 13 and ab = 18, find the value of (a² + b²).
If x, y and z are real numbers such that (x-5)2+(y-7)2+(z-9)2= 0 then (x+y+z) is equal to
If 8x3Â - 125y3Â = (2x - Ay) X (Bx2Â + 25y2Â + Cxy), then find the value of 3 X (2A + 6B) - 2C.
If (a2 + 1/a2) = 18, then find the value of (a3 - 1/a3).
If
= 2 then find 
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Given that (3a + 7b = 54) and (ab = 24), determine the value of (9a2 + 49b2).
If x + y + z = 30, x² + Y² + z² = 460 and x z = y², then find the value of x z?
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