Question

v 4( {3}^{2} - 1)" alt="7 - 8 \div 4( {3}^{2} - 1)" align="absmiddle" class="latex-formula">

Answer 1

Use PEMDAS

P Parentheses first

E Exponents (ie Powers and Square Roots, etc.)

MD Multiplication and Division (left-to-right)

AS Addition and Subtraction (left-to-right)

$7-8\div4\cdot(3^2-1)=7-2\cdot(9-1)=7-2\cdot8=7-16=-9$