nikfrago nikfrago

20-10-2022
Mathematics

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use your graphing calculator to check whether r= -9 and r= -11 are solutions to the equation r^2 + 11r + 28 = 10

y1=
y2=

proposed solutions | x | y1 | y2
-9 | ? | ?
-11 | ? |?

r= -9 is/is not a solution?
r= -11 is/is not a solution?

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