Question

Q4. Which
these identities is not true??
a.(x+y)=x²+2xy+y²
b.(x-y)=x²-2xy+y²
c.x²-y²=(x+y)(x-y)
d.(x+y+z)²=x²+y²+z²+3xyz​

Answer 1

Answer:

d

Step-by-step explanation:

(x+y+z)²=x²+y²+z²+2(xy+yz+zx)