Solve for x in the equation x^2+20x+100=36
1 answer:
Factoring - I always found this to be easy (one of the few things in math that I felt was easy!) x^2 + 20x + 100 = 36 First step is to get the right side to zero. Do this by subtracting 36. x^2 + 20x + 64 = 0 Now we have to factor the expression. We could use quadratic formula, completing the square, or use the product/sum rule if possible (which it is). 64's factors are: 1, 64 2, 32 4, 16 8, 8 We need the two factors that sum to 20... (x + 4)(x + 16) = 0 Set each factor to zero x + 4 = 0 and x + 16 = 0 Solve each equation x = -4 and x = -16 You should always check for extraneous solutions. I recommend using desmos.com to check answers!
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So.. 55x3=165 165 is already in its simplest form I don’t think you can square root it