Answer:
x²+10x+21
Step-by-step explanation:
pabrainliest:>
21x²
(x+3)(x+7)
x+x(1+1)= x²
7 x3=21
= 21x²
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Answers & Comments
Answer:
x²+10x+21
Step-by-step explanation:
pabrainliest:>
Answer:
21x²
Step-by-step explanation:
(x+3)(x+7)
x+x(1+1)= x²
7 x3=21
= 21x²