1) (х-6) (х+6) = х² + 6х - 6х - 36 = х² - 36
3) (3b-5) (3b+5) = 9b² + 15b -15b - 25 = 9b² - 25
5)(m5-n³) (m5+n³) = m10 + m5n³ - m5n³ - n6 = m10 - n6
7)на картинке ответ 7
1) = b² - 6b + 6b - 36 - 3b² - 6b = -2b² - 6b - 36
1) = x² - 2x + 2x - 4 - x² + 6x = -4 + 6x
-4+6x=0
6x=4
х= 2/3
1) (х-6) (х+6) = х² + 6х - 6х - 36 = х² - 36
3) (3b-5) (3b+5) = 9b² + 15b -15b - 25 = 9b² - 25
5)(m5-n³) (m5+n³) = m10 + m5n³ - m5n³ - n6 = m10 - n6
7)на картинке ответ 7
1) = b² - 6b + 6b - 36 - 3b² - 6b = -2b² - 6b - 36
1) = x² - 2x + 2x - 4 - x² + 6x = -4 + 6x
-4+6x=0
6x=4
х= 2/3