Решите срочно, пожалуйста!)
1. Представьте в виде квадрата двучлена трехчлены:
1) z² + 1,4z + 0,49
2) 2,25 - 3x + x²
3) 3,61 + 3,8d + d²

2. Упростите выражения:
1) (m + 8)² - (m - 2n) ⋅ (m + 2n)
2) (n + 15)² - n ⋅ (n - 19)
3) (6 - 5m) ⋅ (5m + 6) + (5m - 4)²
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