Answer:
4.775
Step-by-step explanation:
A) -13
Bcz
x^2-13x+12=0
x^2-x-12x+12=0
x(x-1)-12(x-1)=0
(x-1)(x-12)=0
b 56°
a 71°
d 19°
c 127°
dum dadummm dumm dududu
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