Question

Помогите Пожалуйста с математикой с 11 по 20

Answer 1

140

$1) (x+y)^2 = x^2+2xy+y^2\\\\2) (m+n)^2 = m^2 + 2mn + n^2\\\\3) (x+1)^2 = x^2 + 2x + 1\\\\4) (m - n)^2 = m^2 - 2mn + n^2\\\\5) (s + 2)^2 = s^2 + 4s + 4$

$6) (1-n)^2 = 1 - 2n + n^2\\\\7) (3+t)^2 = 9 + 6t + t^2\\\\8) (2 - x)^2 = 4 - 4x + x^2\\\\9) (c - 1)^2 = c^2 - 2c + 1\\\\10) (a - 3)^2 = a^2 - 6a + 9$

$11) (4-a)^2 = 16 - 8a + a^2\\\\12) (m+5)^2 = m^2 + 10m + 25\\\\13) (m - 6)^2 = m^2 - 12m + 36\\\\14) (7+b)^2 = 49 + 14b + b^2\\\\15) (k + 8)^2 = k^2 + 16k + 64$

$16) (9-y)^2 = 81 - 18y + y^2\\\\ 17) (n - 10)^2 = n^2 - 20n + 100\\\\18) (m+11)^2 = m^2 + 22m + 121\\\\19) (12 - x)^2 = 144 - 24x + x^2\\\\20) (a - 15)^2 = a^2 - 30a + 225$