Let's solve together :)
Solving for a.
First, add 56 to both sides to get this:
8ab+2a=−56b+6
Factor out variable "a".
a(8b+2)=−56b+6
Divide both sides by 8b+2.
a = -28b+3 / 4b+1
Have a great day. :)
Let’s first expand out before factorising completely.
(2a + 2b) (2a + 2b) =
4a^2 + 8ab + 4b^2
Add to 4b^2 - a^2
4a^2 + 8ab + 8b^2 - a^2
= 3a^2 + 8ab + 8b^2
=8b (a + b) + 3a^2
=8b (a + b + 3a^2/8b)
=8b (b+ a(1+3a/8b))
This might be wrong lol.
The triangles are similar by AA axiom
so
4/32 = x/40
x = 5
Th answer is two. -8 * 2 = 16, -16 + 9 = -7.