(t+a)²=t²+2at+a²
(b-n)(b+n)=b²-n²
p²-2pb+b²=(p-b)²
p²+2pb+b²=(p+b)²
(5a-3)²=(5a)²-2*5a*3+3²=25a²-30a+9
(9+4b)(4b-9)=(4b-9)(4b+9)=(4b)²-9²=16b²-81
(-x²+y³)(x²+y³)=(y³-x²)(y³+x²)=(y³)²-(x²)²=y⁶-x⁴
(2m+3n)²=(2m)²+2*2m*3n+(3n)²=4m²+12mn+9n²
Ответ:
1
1) t² + 2at + a² 2) b² - n²
2
1) (p - b)(p - b) 2) (p + b)(p + b)
3
1)25a² - 30a + 9 2)16b² -81
3)y⁶ - x⁴ 4) 4m² + 12mn + 9n²
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Answers & Comments
(t+a)²=t²+2at+a²
(b-n)(b+n)=b²-n²
p²-2pb+b²=(p-b)²
p²+2pb+b²=(p+b)²
(5a-3)²=(5a)²-2*5a*3+3²=25a²-30a+9
(9+4b)(4b-9)=(4b-9)(4b+9)=(4b)²-9²=16b²-81
(-x²+y³)(x²+y³)=(y³-x²)(y³+x²)=(y³)²-(x²)²=y⁶-x⁴
(2m+3n)²=(2m)²+2*2m*3n+(3n)²=4m²+12mn+9n²
Ответ:
1
1) t² + 2at + a² 2) b² - n²
2
1) (p - b)(p - b) 2) (p + b)(p + b)
3
1)25a² - 30a + 9 2)16b² -81
3)y⁶ - x⁴ 4) 4m² + 12mn + 9n²