Answer:
Step-by-step
We have :
2×(0,4)×15=12
(0,4)^2=0,16
(15y + ∗)^2 = 225y² + 12x³y + 0.16x⁶
= (15y)² + 2×(15y)×(0.4x³) + (0.4x³)²
then
∗ = 0.4x³
Answer:
Step-by-step explanation:
(a + b)² = a² + 2ab + b²
a = 15y
2ab = 12x³y
2* 15y*b = 12x³y
[tex]b=\frac{12*x^{3}*y}{2*15*y}\\\\b=\frac{2x^{3}}{5}\\\\b=0.4x^{3}[/tex]
(15y + 0.4x³)
