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lianna [129]
4 years ago
6

i'm doing operations with complex numbers and i understand everything until there's a number in front of the parentheses so plea

se help :(
Mathematics
1 answer:
UkoKoshka [18]4 years ago
5 0
It a number is in front of a parentheses that just means you have to multiply everything inside the parentheses by the number in front
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Answer:

8r⁶s³ - 5r⁵s⁴ + r⁴s⁵ + 5r³s⁶

Step-by-step explanation:

(8r⁶s³-9r⁵s⁴+3r⁴s⁵)-(2r⁴s⁵-5r³s⁶-4r⁵s⁴)​

We need to combine like terms, take care the exponents of r and s

(8r⁶s³-9r⁵s⁴+3r⁴s⁵)-(2r⁴s⁵-5r³s⁶-4r⁵s⁴)​

multiply the second parenthesis by -1

= 8r⁶s³-9r⁵s⁴+3r⁴s⁵-2r⁴s⁵+5r³s⁶+4r⁵s⁴

= 8r⁶s³ + (-9r⁵s⁴ + 4r⁵s⁴) + (3r⁴s⁵-2r⁴s⁵) + 5r³s⁶

= 8r⁶s³ - 5r⁵s⁴ + r⁴s⁵ + 5r³s⁶

Note: r⁶s³ is not like r³s⁶

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