1)1) (х-5)^2 = x^2 - 10x + 252) (6а+7b)^2 = 36a^2 + 84ab + 49b^23) (m+3)(m-3) = m^2 - 94) (8m-4n)(8m-4n) = 64m^2 - 64mn + 16n^2
2)1) 100-x^2 = (10+x)(10-x)2) 121a^2-25b^2 = (11a+5b)(11a-5b)3) (c-8)^2 = c^2 - 16c + 644) 81a^2-72ab+16b^2 = (9a-4b)(9a-4b)
3)(2m+6n)^2-5m(2m-n)= (4m^2 + 24mn + 36n^2) - 10m^2 + 5mn= 4m^2 + 24mn + 36n^2 - 10m^2 + 5mn= -6m^2 + 29mn + 36n^2
1)
1) (х-5)^2 = x^2 - 10x + 25
2) (6а+7b)^2 = 36a^2 + 84ab + 49b^2
3) (m+3)(m-3) = m^2 - 9
4) (8m-4n)(8m-4n) = 64m^2 - 64mn + 16n^2
2)
1) 100-x^2 = (10+x)(10-x)
2) 121a^2-25b^2 = (11a+5b)(11a-5b)
3) (c-8)^2 = c^2 - 16c + 64
4) 81a^2-72ab+16b^2 = (9a-4b)(9a-4b)
3)
(2m+6n)^2-5m(2m-n)
= (4m^2 + 24mn + 36n^2) - 10m^2 + 5mn
= 4m^2 + 24mn + 36n^2 - 10m^2 + 5mn
= -6m^2 + 29mn + 36n^2