Question

Expand = {7m - 3n - 4k}2

Answer 1

Answer:

14m-6n-8k

Step-by-step explanation:

we have given,

(7m-3n-4k)2

= 2×7m - 2×3n -2×4I

= 14m - 6n - 8k

Answer 2

Answer:

[7m-3n-4k]²

=(7m)²+(3n)²+(4k)² + 2(7m)(-3n) + 2(-3n)(-4k) + 2(7m)(-4k)

= 49m²+(9n²)+(16k²)+ 2(7m)(-3n) + 2(-3n)(-4k) + 2(7m)(-4k)

=49m²+ 9n²+ 16k² - 42mn + 24nk - 56mk

[7m-3n-4k]² = 49m²+ 9n²+ 16k² - 42mn + 24nk - 56mk

Step-by-step explanation:

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