Question

Subtract 3x + 4x2 – 7 from x4 + 3x2 - 4x + 4.​

Answer 1

Step-by-step explanation:

3×8-7×4+6-8

= 24-7×10-8

= 17×2

= 34

Answer 2

$\small = > ( {x}^{4} + {3x}^{2} - 4x + 4) - (3x + {4x}^{2} - 7) \\ \small = > {x}^{4} + {3x}^{2} - 4x + 4 - 3x - {4x}^{2} + 7\\ \small\{ \rm collecting \: \: like \: \: terms \} \\ \small = > {x}^{4} + {3x}^{2} - {4x}^{2} - 4x - 3x + 4 - 7 \\ \small = > {x}^{4} + (3 - 4) {x}^{2} - (4 + 3)x + (4 - 7) \\ \small\{ \rm performing \: \: calculation \: \: in\: \:parenthese \} \\ = > {x}^{4} + ( { - 1x}^{2} ) - 7x + ( - 3) \\ \small\{ \rm removing \: \:parenthese \} \\ \boxed{ = > \red{{x}^{4} - {x}^{2} - 7x - 3}}$