Вариант 4 1) (y + 6)(y – 6) 2) (x - 8)2 3) (2 - y)(у + 2) 4) (5x + 1)2 5) (4 –...

Question

Вариант 4

1) (y + 6)(y – 6)

2) (x - 8)2

3) (2 - y)(у + 2)

4) (5x + 1)2

5) (4 – 6b)(6b+4)

6) (a - 9x)2

7) (4x2 – 2y)2

8) (2a + 5b)(5b – 2a)

9) (3 + 6x3)2

10) (5 – m2)(5 + m2) разложить на множители

Comments

в примерах 

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2 это степень?

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или умножение

Answer 1

1) (y+6)(y-6) = y²-6² = y²-36 
2) (x-8)² = x²-2*x*8+8² = x²-16x+64
3) (2-y)(y+2) = (2-y)(2+y) = 2²-y² = 4-y²
4) (5x+1)² = (5x)²+2*5x*1+1² = 25x²+10x+1 
5) (4-6b)(6b+4) = (4-6b)(4+6b) = 4²-(6b)² = 16-36b²
6) (a-9x)² = a²-2*a*9x+(9x)² = a²-18x+81x²
7) (4x²-2y)² = (4x²)²-2*4x²*2y+(2y)² = 4x^4-16x²y+4y²
8) (2a+5b)(5a-2b) = (5a+2b)(5a-2b) = (5a)²-(2b)² = 25a²-4b²
9) (3+6x³)² = 3²+2*3*6x³+(6x³)² = 9+36x³+36x^6
10) (5-m²)(5+m²) = 5²-(m²)²=25-m^4