Mathematics
14.06.2022 01:32
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Billie solved the equation below by completing the square, but she got the incorrect
Billie solved the equation below by completing the square, but she got the incorrect solution. in which step did billie first make an error? choices: 1234
step 1: x^2+10x=49
step 2: x^2+10x+25=49
step 3: (x+5)^2=49
step 4: x+5=+-7
step 5: x=2, x=–12
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step 1: x^2+10x=49
step 2: x^2+10x+25=49
step 3: (x+5)^2=49
step 4: x+5=+-7
step 5: x=2, x=–12
ssargeant2559
4,9(17 marks)
step 2
Step-by-step explanation:
we have
---> given problem
step 1
Move the constant to the right side
the step 1 is correct
step 2
Complete the square
The step 2 is not correct
step 3
Rewrite as perfect squares
step 4
take square root both sides
step 5
Find the values of x
WolfMeadows
4,5(50 marks)
Length = 7 inches
Step-by-step explanation:
Perimeter = 2L+2W
Perimeter = 26
W = 6
Plug these in: 26=2L + 2*6 ; 26 = 2L + 12
Subtract 12 from both sides.
26-12 = 2L +12 -12 ; 14 = 2L
Devide by 2
14/2 = 2L/2
L=7
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