# Step-by-step Solution

Go!
1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

## Step-by-step explanation

Problem to solve:

$\left(2a+5\right)\left(2a-5\right)$

Learn how to solve special products problems step by step online.

$\left(2a\right)^2-1\cdot 5^2$

Learn how to solve special products problems step by step online. Solve the product (2a+5)(2a-5). The sum of two terms multiplied by their difference is equal to the square of the first term minus the square of the second term. In other words: (a+b)(a-b)=a^2-b^2, where:<ul><li>The first term (a) is 2a.</li><li>The second term (b) is 5.</li></ul>Then:. Calculate the power 5^2. Multiply -1 times 25. The power of a product is equal to the product of it's factors raised to the same power.

$4a^2-25$
$\left(2a+5\right)\left(2a-5\right)$