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Find the sum of (2x2 – 6x – 2) and (x2 + 4x).

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

2y+y=5

add 2y and y

the answer is c. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀