Question

the value of polynomial 5x - 4x² + 3 when x =​

Answer 1

Answer:

$\sf \green{1) Let \:x = 0}$

$\sf \blue{5x - 4x² + 3 = 5(0) - 4(0)² + 3}$

$\sf \pink \implies \purple {0 - 4(0) + 3}$

$\sf \red \implies \orange {0 - 0 + 3}$

$\sf \blue \therefore \boxed {\green {3}}$

$\blue{▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂}$

$\sf \pink {2) Let \:x = -1}$

$\sf \purple {5x - 4x² + 3 = 5(-1) - 4(-1)² + 3}$

$\sf \orange \implies \red {-5 -4 +3}$

$\sf \green \implies \blue {-9 + 3}$

$\sf \purple \therefore \boxed {\pink {-6}}$

$\green{▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂}$

$\sf \orange {3) Let\: x = 2}$

$\sf \red {5x - 4x² + 3 = 5(2) -4(2)² + 3}$

$\sf \blue \implies \green {10 - 4(4) + 3}$

$\sf \pink \implies \purple {10 - 16 + 3}$

$\sf \red \implies \orange {-6 + 3}$

$\sf \green \therefore \boxed{\blue {-3}}$

Answer 2

Answer:

$\sf \green{1)Let\:x=0}$

$\sf \blue{5x - 4x² + 3 = 5(0) - 4(0)² + 3}$

$\sf \pink \implies \purple {0 - 4(0) + 3}$

$\sf \red \implies \orange {0 - 0 + 3}$

$\sf \blue \therefore \boxed {\green {3}}$

$\blue{▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂}$

$\sf \pink {2) Let \:x = -1}$

$\sf \purple {5x - 4x² + 3 = 5(-1) - 4(-1)² + 3}$

$\sf \orange \implies \red {-5 -4 +3}$

$\sf \green \implies \blue {-9 + 3}$

$\sf \purple \therefore \boxed {\pink {-6}}$

$\green{▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂}$

$\sf \orange {3) Let\: x = 2}$

$\sf \red {5x - 4x² + 3 = 5(2) -4(2)² + 3}$

$\sf \blue \implies \green {10 - 4(4) + 3}$

$\sf \pink \implies \purple {10 - 16 + 3}$

$\sf \red \implies \orange {-6 + 3}$

$\sf \green \therefore \boxed{\blue {-3}}$