Question

if a =24, b =20, c =30 find value of ab + bc+ ca with steps ​

Answer 1

Answer:

1800

Step-by-step explanation:

480+600+720=1800

mark brainlist

Answer 2

$\underline{\huge \green{\mathcal{GIVEN :}}}$

$A= 24 \\ B= 20 \\ C=30 \\ \boxed{Then AB+BC+ CA =?}$

$\blue{\underline{\large{\mathbb{EXPLANATION}}}}$

Frist we want to know one thing:

if anyone represent (AB) like this that means (A×B) . it is very important

now frist place the values in the place of( A,B,C )

HERE,

AB+BC+ CA= ?

look at here

( A×B + B×C + C× A= ?)

now multiple the values and add the values then we get answer.

$\pink{ \underline{\large{sum :}}}$

$A= 24 \\ B= 20 \\ C=30 \\ {Then AB+BC+ CA =?} \\ \implies \: 24 \times 20 + 20 \times 30 + 30 \times \\ 24 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \implies \: 480 + 20 \times 30 + 30 \times 24 \\ \implies \: 480 + 600 +30 \times 24 \: \: \: \: \: \: \: \: \\ \implies \: 480 + 600 + 720 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \implies \: 1080 + 720 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \implies \: 1800 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \boxed{ \because{AB+BC+CA=1800} }$

[ I think my answer will help you]