Question

Add the following-
1) 6x²-3x+4,8x-9,15x²-11x+10​

Answer 1

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Addition

= 6x² - 3x + 4 + 8x - 9 + 15x² - 11x + 10

= 6x² + 15x² - 3x + 8x - 11x + 4 - 9 + 10

= 21x² - 14x + 8x + 14 - 9

= 21x² - 6x + 5

which is your required answer!!

Answer 2

$6 {x}^{2} - 3x + 4 + 8x - 9 + 15 {x}^{2} - 11x + 10 \\ = 6 {x}^{2} + 15 {x}^{2} - 3x + 8x - 11x + 4 + 10 - 9 \\ = 21 {x}^{2} - 6x + 5$