(2b-9)(2b+9)=

Simple and best practice solution for (2b-9)(2b+9)= equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for (2b-9)(2b+9)= equation:


Simplifying
(2b + -9)(2b + 9) = 0

Reorder the terms:
(-9 + 2b)(2b + 9) = 0

Reorder the terms:
(-9 + 2b)(9 + 2b) = 0

Multiply (-9 + 2b) * (9 + 2b)
(-9(9 + 2b) + 2b * (9 + 2b)) = 0
((9 * -9 + 2b * -9) + 2b * (9 + 2b)) = 0
((-81 + -18b) + 2b * (9 + 2b)) = 0
(-81 + -18b + (9 * 2b + 2b * 2b)) = 0
(-81 + -18b + (18b + 4b2)) = 0

Combine like terms: -18b + 18b = 0
(-81 + 0 + 4b2) = 0
(-81 + 4b2) = 0

Solving
-81 + 4b2 = 0

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '81' to each side of the equation.
-81 + 81 + 4b2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + 4b2 = 0 + 81
4b2 = 0 + 81

Combine like terms: 0 + 81 = 81
4b2 = 81

Divide each side by '4'.
b2 = 20.25

Simplifying
b2 = 20.25

Take the square root of each side:
b = {-4.5, 4.5}

See similar equations:

| 3p-2=-56 | | y=8log(2x) | | 7(7+a)=119 | | -6r-3=81 | | 9(-10+x)=45 | | b-20=40 | | -1-9x=-46 | | -v-8=-11 | | 9(p+10)=0 | | -8(3+x)=-96 | | -9x-2=-155 | | -7=m-20 | | 4(4x-12)=44 | | 143=11r | | -6=r-18 | | 29x-1+65=180 | | 3x+5x+15=16+31 | | 29x-1=65 | | -6(-2+x)=6 | | -7-n=-16 | | 7.1a=35.5 | | Y=5sin(20+3)-7 | | 5a-4=36 | | 5x+15y=5 | | x^2+40x-400=0 | | (1*x)+(1.5*y)=3 | | 1*x+1.5*y=3 | | 4x(3x-7)(7x+3)=0 | | 4(5-3a)=11 | | 4x+2=-9x+353 | | sin(x-20)=cos(2x) | | 7x+2=4x+47 |

Equations solver categories