Question

Rapid, va rooooog......

Answer 1

1. a) (x+4)^2=x^2+8x+16

b) (x-3)^2=x^2-6x+9

2. 8x^7+12x^3=

4x^4(2x^4+3)

b) x^2-49= (x-7)×(x+7)

3. 5x^2=245

x^2=49

x=7

4. x=2+2rad.3+3+1-6

x=2rad.3

2rad.3<5

5. E(x)=3x^5-6x^4+3x^3

E(x)=3x^3×(x^2-2x+1)

E(x)=3x^3×(x-1)^2

6. 10a+b-a^2-b<25

10a-a^2<25