plz answer it crrctly either it will be reported with all ur questions....and right answer will get brain list
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Step-by-step explanation:
1) x^2-(-3-7)x+(-3)×(-7)
=x^2+10x+21
2) here a=7 & d=6 n=19
t19= a+(n-1)d
=7+(19-1)×6
=7+18×6
=7+106
=113
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3
Answer:
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