ChloeLiz7111
18.07.2019 •
Mathematics
Can someone walk me through completing the square with this equation: r^2 + 6r = 16?
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Ответ:
Roots: 2, -8
Step-by-step explanation:
Use of formula: a^2+2ab+b^2= (a+b)^2Below steps show how to complete square and solve the equation:
r^2 + 6r = 16r^2 + 2*3*r = 16 adding below missing part of equation, and completing squarer^2 + 2*3*r + 3^2= 16+ 3^2(r+3)^2= 25r+3= ± 5r= - 3 ± 5r= 2, r= - 8Roots are 2 and - 8
Ответ: