twice the square of the sum of a number and 3 is 98. Find the number
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twice the square of the sum of a number and 3 is 98. Find the number
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Answer:
x=4 or -10
Step-by-step explanation:
Let the number be x.
given,2(x+3)^2=98
or,2(x^2+6x+9)=98
or,x^2+6x+9=49
or,x^2+6x-40=0
or,x^2+10x-4x-40=0
or,x(x+10)-4(x+10)=0
or,x=4,-10