Question

Simplify this question

Answer 1

$4 + \sqrt{ - 16} \\ = 4 + \sqrt{ - 2 \times 2 \times 2 \times 2} \\ = 4 + 2\sqrt{ - 4} \\ = 2(2 + \sqrt{ - 4} )$

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer 2

$\\ \sf\longmapsto 4+√-16$

$\\ \sf\longmapsto 4+√16i$

$\\ \sf\longmapsto 4+4i$

• Take 4common

$\\ \sf\longmapsto 4(1+i)$