grade 7
write the expressions 5x^2-4-3x^2+6x+8+5x-13,find the value if x=-2
ghousi:
say me fast
i am waiting for u
i know how to slove if u say answer is correct
i wanted solve all the maths problems
my text book problems by sending my questions
ok i am not asking that
i am aslking 47 is the correct anser for this sum
or not
does ths sign ^ mean multiply..??
square root
Answers
Answered by
2
it is 47 said in following expression
Answered by
6
5x²-4-3x²+6x+8+5x-13
= 5(-2)²-4-3(-2)²+6×(-2)+8+5(-2)-13
= 5×4-4-3×4+(-12)+8+(-10)-13
= 20-4-12-12+8-10-13
= 28-51
= -23
= 5(-2)²-4-3(-2)²+6×(-2)+8+5(-2)-13
= 5×4-4-3×4+(-12)+8+(-10)-13
= 20-4-12-12+8-10-13
= 28-51
= -23
I hope it will help you.
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