1

1) х²-у² = (х-у)(х+у)

2) 4а²-в² = (2а-в)(2а+в)

3) 0,09а²-9в² = (0,3а-3в)(0,3а+3в)

2

1) 100-25у² = (10-5у)(10+5у)

2) а²в² - 4 = (ав-2)(ав+2)

3) 4/9х² - 1/16у² = (2/3х-1/4у)(2/3х+1/4у)

3

1) 79² - 21² = (79-21)(79+21) = 58*100 = 5800

2) 78² - 22² = (78-22)(78+22) = 56*100 = 5600

1

1) р³ - t³ = (p-t)(p² + pt +t²)

2) 8+x³ = (2+x)(4-2x+x²)

3) 125+y³ = (5+y)(25-5y+y²)

2

1) m³ - n⁶ = (m-n²)(m² + mn² + n⁴)

2) a⁹ +b⁹ = (a³+b³)(a⁶-a³b³ +b⁶)

3

1) 0.001x³ - 8y³ = (0.1x - 2y)(0.01x² + 0,2xy + 4y²)

2) 27a³ - 125b³ = (3a-5b)(9a²+15ab + 25b² )