Question

ex 3


va rog



repede .............​

Answer 1

Explicație pas cu pas:

3

a) a+b=-2

ab=1(-35)=35

1,-35

5,-7

1-35=-34

5-7=-2

a=-7

b=5

(x²-7x) +(5x-35)

x(x-7) +5(x-7)

(x-7) (x+5)

b) a+b=16

ab=1×63=63

1,63

3,21

7,9

1+63=64

3+21=24

7+9=16

a=7

b=9

(x²+7x) +(9x+63)

x(x+7) +9(x+7)

(x+7) (x+9)

c) a+b=-1

ab=1(-2) =-2

a=-2

b=1

(x²-2x) +(x-2)

x(x-2) +x-2

(x-2) (x-1)

d)(y²-4y+8) (y²+4y+8)

e) a+b=7

ab=15(-2) =-30

-1, 30

-2, 15

-3, 10

-5, 6

-1+30=29

-2+15=13

-3+10=7

-5+6=1

a=-3

b=10

(15x²-3x) +(10x-2)

3x(5x-1) +2(5x-1)

(5x-1) (3x+2)

f) a+b=-5

ab=3(-2) =-6

1,-6

2,-3

1-6=-5

2-3=-1

a=-6

b=1

(3x²-6x) +(x-2)

3x(x-2) +x-2

(x-2) (3x+1)

g) a+b=13

ab=5(-6) =-30

-1, 30

-2, 15

-3, 10

-5, 6

-1+30=29

-2+15=13

-3+10=7

-5+6=1

a=-2

b=15

(5x²-2x) +(15x-6)

x(5x-2) +3(5x-2)

(5x-2) (x+3)

h)a+b=-12

ab=1×35=35

-1, -35

-5, -7

-1-35=-36

-5-7=-12

a=-7

b=-5

(x²-7x) +(-5x+35)

x(x-7) -5(x-7)

(x-7) (x-5)

Sper că te-am ajutat!