Question

Даю 40 балов номер 1,2,3

Answer 1

#1

1) (2x-9y)(2x+9y)

2) (ab-4/3)(ab+4/3)

3) (1,3y⁷-30z⁴)(1,3y⁷+30z⁴)

4) (6a³b⁵-1)(6a³b⁵+1)

5) (7/5 m³n²- 5/4 ab⁴)(7/5 m³n²+ 5/4 ab⁴)

6) $3^{4k}-25= (3^{2k}-5)(3^{2k}+5)$

#2

1) (4x-3)²-5²= (4x-3-5)(4x-3+5)= (4x-8)(4x+2)= 8(x-2)(2x+1)

2) (a³)²-(a+4)²= (a³-a-4)(a³+a+4)

#3

(3x+4)²-(2x-3)²=0

(3x+4-2x+3)(3x+4+2x-3)=0

(x+7)(5x+1)=0

x1= -7

x2= -0,2