Question

if p=2 then find the value of -2p³-5p²+7​

Answer 1

Answer:

Value of expression, $-2p^{3}-5p^{2}+7$  is $-29$ for , $p = 2$ .

Step-by-step explanation:

To find : value of expression, $-2p^{3}-5p^{2}+7$

Given : $p =2$

Solution :

• According to question we have find the value of given expression $-2p^{3}-5p^{2}+7$  by substituting the given value of $p$ .
• After substituting the value we perform arithmetic operation such as , addition,  subtraction and multiplication to find the value of expression.  

         $-2p^{3}-5p^{2}+7\\\\= -2 (2 )^{3}-5(2)^{2} + 7\\\\=-2 (8 )- 5 (4 ) + 7\\\\=-16 -20 +7\\\\=-16 -13\\\\=-29$