(5x + 2)2 + 15x + 6 = 0

X= -2/5

Step-by-step explanation:

Distribute within the parenthesis

10x + 4 +15x + 6= 0

Combine like terms

25x + 10 = 0

Isolate x

25x =-10

x= -10/25= -2/5

Check your answer by plugging it in back into the equation.

(-2 +2) +15(-2/5) + 6 = 0

0 + (-6) + 6 = 0

x = -0.4

Step-by-step explanation:

(5x+2)2 + 15x + 6 = 0

10x + 4 + 15x + 6 = 0         Simplify

25x + 4 + 6 = 0

25x + 10 = 0                    Subtract 10 from both sides

        - 10   -10

25x = -10

25x/25 = -10/25           Divide by 25 on both sides

x = -0.4

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !