If $x = 3$ , then the value of $20 x^{7} + x^{5} 3.$

Open in App

Solution

Given
$20 x^{7} + x^{5} 3$
$= x^{5} (20 x^{2} + 3)$

Putting $x = 3$ :

$= (3)^{5} (20 (3)^{2} + 3)$
$= 3^{5} \times (20 \times 9 + 3)$
$= 3^{5} (180 + 3)$
$= (180 + 3) 243$
$= 183 \times 243$
$= 44469$ , is the required value.

Suggest Corrections

Similar questions

\frac{5}{3}

\int {(\frac{x}{1 + x^{5}})}^{3 / 2} d x

x^{53}

(x - 3)^{100}

x^{10}

(x + x^{2} + x^{3} + x^{4} + x^{5})^{3}

x^{5} (3 - 6 x^{- 9})

Join BYJU'S Learning Program