Question

plz answer my friends asappppp

Answer 1

Answer:

(A) (5m - 3n + p)^2

(B) 3,060

Step-by-step explanation:

^ indicates power

7(A)

Using (x - y + z)^2 = x^2 + y^2 +z^2 - 2xy - 2yz + 2zx

25m^2 + 9n^2 + p^2 - 30mn - 6np + 10pm =

(5m)^2 + (3n)^2 + p^2 - 2(5m)(3n) - 2(3n)(p) + 2(p)(5m) =

(5m - 3n + p)^2

(B) We know that if x + y + z = 0, Then x^3 + y^3 + z^3 = 3xyz

Let x = 17

y = -12

z = -5

x + y + z = 17 + (-12) + (-5)

x + y + z = 17 - 12 - 5

= 0

therefore, 17^3 + (-12)^3 + (-5)^3 =

3(17)(-12)(-5) =

3,060