Discover Questions

√17x+2 +√x+7 = 9 .....is there anyway to know how much solution will this equation have without solving it .options : -1/0/2/none sollution? If a and b are positive integers such that gcd(a,b)=210, lcm[a,b]=210^3, and a** **If Earths atmosphere was 20 percent as thick as now how big would the temperature swings be? If the fifth term of a geometric sequence is 81 and the common ratio is 3/4, find the sum of the first 20 terms? What should be added to equation to make it a perfect square 9x^4 + 2x^2 + 25? ....Please!?