ito na po thank you so much...

Answer:
Standard form
1.a²+4a+8+-7=0
A=4
B=8
C=7
2.3(3x+1)²=0
A=3
B=3
C=1
3.15=b²=0
A=15
B=1
C=1
Step-by-step explanation:
Sana makatulong baby girl
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