Номер 4 и 6(б)!!!!!!!!!!!!!! Срочно!

Question

Номер 4 и 6(б)!!!!!!!!!!!!!! Срочно!

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Answer 1

(2-x) 2-x (x+1, 5)=4 4-4x+x2-x2+1, 5x=4 2, 5x=0 25a2-(a+3) 2 25a2-a2+6a+9 24a2 +6a+9