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Anika Huffman
Mathematics
11 July, 16:58
Use the Quadratic Formula to solve
x²-13x+42=0
+2
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Cael
11 July, 17:11
0
x1=7,
x2=6
Step-by-step explanation:
x²-13x+42=0
a=1, b=-13, c=42
x1,2 = (-b+-sqrt (b^2-4ac)) / 2a
x1,2 = ( - (-13) + -sqrt ((-13) ^2-4*1*42)) / 2*1
x1,2 = (13+-sqrt (169-168)) / 2
x1,2 = (13+-sqrt (1)) / 2
x1,2 = (13+-1) / 2
x1 = (13+1) / 2, x2 = (13-1) / 2
x1=14/2, x2=12/2
x1=7, x2 = 6
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