Answer:
He set the factored expressions equal to each other. instead of setting them equal to zero
Step-by-step explanation:
f(x) = x^2 + 4x + 3. His work is shown below.
0 = x^2 + 4x + 3
0 = (x + 3)(x + 1)
Here is where we use the zero product property
x+3 = 0 x+1 =0 We do not set them equal to each other
Ignore this answer its wrong. I forgot to not save it. Sorry for the confusion. I wanted to delete this answer but I can't.
B bc it’s not a or c or d
I got you
Try to multiply the rote number which would be 60+40-7=93
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