I got #2 on some tries and #4 on the others. Could someone tell me the answer? thanks
A Audentes Junior Member Joined Jun 8, 2020 Messages 187 Jan 26, 2021 #1 I got #2 on some tries and #4 on the others. Could someone tell me the answer? thanks Attachments 51CAA2D2-3626-4ADC-ABCE-DFDAA8CF94FE.jpeg 264.8 KB · Views: 12
lev888 Elite Member Joined Jan 16, 2018 Messages 2,939 Jan 26, 2021 #3 Flo Rida said: I got #2 on some tries and #4 on the others. Could someone tell me the answer? thanks Click to expand... Please post your solution.
Flo Rida said: I got #2 on some tries and #4 on the others. Could someone tell me the answer? thanks Click to expand... Please post your solution.
J JeffM Elite Member Joined Sep 14, 2012 Messages 7,874 Jan 26, 2021 #4 Let’s work it out [MATH]3(x^2 + 2x - 3 ) - 4(4x^2 - 7x + 5) =\\ 3x^2 + 6x - 9 - 16x^2 + 28x - 20 = \\ x^2(3 - 16) + x(6 + 28) - (9 + 20) =\\ -13x^2 + 34x - 29.[/MATH]How do you check your answer for this type of problem?
Let’s work it out [MATH]3(x^2 + 2x - 3 ) - 4(4x^2 - 7x + 5) =\\ 3x^2 + 6x - 9 - 16x^2 + 28x - 20 = \\ x^2(3 - 16) + x(6 + 28) - (9 + 20) =\\ -13x^2 + 34x - 29.[/MATH]How do you check your answer for this type of problem?
A Audentes Junior Member Joined Jun 8, 2020 Messages 187 Jan 26, 2021 #5 lev888 said: Please post your solution. Click to expand... Sorry if a bit low quality Attachments 57DE69C0-A67E-47E9-9766-856957D7694C.jpeg 1.6 MB · Views: 6
A Audentes Junior Member Joined Jun 8, 2020 Messages 187 Jan 26, 2021 #6 JeffM said: Let’s work it out [MATH]3(x^2 + 2x - 3 ) - 4(4x^2 - 7x + 5) =\\ 3x^2 + 6x - 9 - 16x^2 + 28x - 20 = \\ x^2(3 - 16) + x(6 + 28) - (9 + 20) =\\ -13x^2 + 34x - 29.[/MATH]How do you check your answer for this type of problem? Click to expand... Substitute x With a number. If x is 1: Both=-8
JeffM said: Let’s work it out [MATH]3(x^2 + 2x - 3 ) - 4(4x^2 - 7x + 5) =\\ 3x^2 + 6x - 9 - 16x^2 + 28x - 20 = \\ x^2(3 - 16) + x(6 + 28) - (9 + 20) =\\ -13x^2 + 34x - 29.[/MATH]How do you check your answer for this type of problem? Click to expand... Substitute x With a number. If x is 1: Both=-8
J JeffM Elite Member Joined Sep 14, 2012 Messages 7,874 Jan 26, 2021 #7 Flo Rida said: Substitute x With a number. If x is 1: Both=-8 Click to expand... This is not a guarantee, but it will work 99 times out of 100.
Flo Rida said: Substitute x With a number. If x is 1: Both=-8 Click to expand... This is not a guarantee, but it will work 99 times out of 100.
