Question

please solve these questions​

Answer 1

$\huge{Answer}$

Given:-

a=9

b=10

c=12

d=5

k=2

m=3

n=4

x=6

y=7

z=8

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1)- -k +3m +5n and 5d -4x -6y

1)-. => (-k+3m+5n)+(5d-4x-6y)

=>. (-2+3×3+5×4)+(5×5-4×6-6×7)

=>. ( -2+9+20)+(25-24-42)

=>. 27+31

=>. 58

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2)- 5m-2y-7b-8c and 3d +x-10a

2)-. (5m-2y-7b-8c)+(3d+x-10a)

=> (5×3-2×7-7×10-8×12)+(3×5+6-10×9)

=>(15-14-70-96)+(15+6-90)

=>-165-69

=>-234

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3)- 3k²-5m²+7n² , -2x+5b-c and 10d - 7a

3)-. (3×2²+7×4²)+(-2×6+5×10-12)+(10×5-7×9)

=>. (3×4+7×16)+(-12+50-12)+(50-63)

=>. (12+102)+(-26)+-13

=> 142-39

=>117

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Like wise do all ^^"

u have too just put the values siso.