Question

(2x+5)(2x+5)? me ajudem porfavor

Answer 1

(2x+5)(2x+5) = (2x+5)^2

(2x+5)^2 = 4x^2+20x+25.

Answer 2

4x²+20x+25

Δ=b²-4ac
Δ=20²-4·4·25
Δ=400-400
Δ=0

x1=(-20+0)/4=-5
x2=(-20-0)/4=-5