Answer:
(a+b)^2+(a-b)^2=2(a^2+b^2)
expanding:
a² + 2ab + b² + a² -2ab + b² = 2a² + 2b²
2a² + 2b² = 2a² + 2b²
with what?
Step-by-step explanation:
the last picture
the one where the line hits the -3 mark on the y-axis
Answer:20??
