Question

if X=1 and y=2 find (2x-3y)³
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Answer 1

Step-by-step explanation:

➡️put the value of x and y in (2x-3y)³

➡️it becomes (2(1)-3(2))³

➡️now it comes out as (2-6)³

➡️(–4)³

➡️it means that we have to multiply -4, three times

⚠️➡️ –4 x –4 x –4

⚠️➡️the answer is –64

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–64is ur required answer

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Answer 2

$\red{\underline{{ \bf Question }}}$

• ɪғ x=1 ᴀɴᴅ ʏ=2 ғɪɴᴅ (2x-3ʏ)³

$\underline {\underline{{ \purple{\sf To \: Find }}}}$

The Value of x is 1 and y is 2

We have to Substitute the Values

$\red{ \rm \implies(2x - 3y)^{3} }$

$\red{ \rm \longrightarrow[(2 \times 1) - (3 \times 2)]^{3} }$

$\red{ \rm \longrightarrow[(2 ) - (6)]^{3} }$

$\red{ \rm \longrightarrow(2 - 6) ^{3} }$

$\red{ \rm \longrightarrow( - 4) ^{3} }$

$\red{ \rm \longrightarrow( - 4 \times - 4 \times - 4) }$

$\red{ \bf \dashrightarrow - 64 }$

ᴛʜᴜs, ᴛʜᴇ ᴠᴀʟᴜᴇ ɪs -64

ᴀᴅᴅɪᴛɪᴏɴᴀʟ ɪɴғᴏʀᴍᴀᴛɪᴏɴ

• A number which when multiplied to itself by 3 times ; we get its cube

• A number which when multiplied to itself by 2 times ; we get its square