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PLEASE HELP ASAP -- WITH THE WORKK

50 points

PLEASE HELP ASAP -- WITH THE WORKK 50 points-example-1
User Marc Cals
by
3.5k points

1 Answer

5 votes

Part-A:-

(f×g)=


\\ \sf\longmapsto x^2+3x-70(4x-12)


\\ \sf\longmapsto 4x^2+12x-280-12x^2+36x+840


\\ \sf\longmapsto -8x^2+48x+560

Now


\\ \sf\longmapsto (f.g)(3)


\\ \sf\longmapsto -8(3)^2+48(3)+560


\\ \sf\longmapsto -72+144+560


\\ \sf\longmapsto 72+560


\\ \sf\longmapsto 632

Part-B:-


\\ \sf\longmapsto f(3)


\\ \sf\longmapsto (3)^2+3(3)-70


\\ \sf\longmapsto 9+9-70


\\ \sf\longmapsto 18-70


\\ \sf\longmapsto -52

Now


\\ \sf\longmapsto g(f(3))


\\ \sf\longmapsto g(-52)


\\ \sf\longmapsto 4(-52-3)


\\ \sf\longmapsto 4(-55)


\\ \sf\longmapsto -220

Part:-C


\\ \sf\longmapsto g(-2)


\\ \sf\longmapsto 4(-2-3)


\\ \sf\longmapsto 4(-5)


\\ \sf\longmapsto -20

Now


\\ \sf\longmapsto f(g(-2))


\\ \sf\longmapsto f(-20)


\\ \sf\longmapsto (-20)^2+3(-20)-70


\\ \sf\longmapsto 400-60-70


\\ \sf\longmapsto 400-130


\\ \sf\longmapsto 270

Part-D:-

  • g×f=f×g


\\ \sf\longmapsto (g.f)(-2)


\\ \sf\longmapsto -8(-2)^2+48(-2)+560


\\ \sf\longmapsto 32-96+560


\\ \sf\longmapsto -64+560


\\ \sf\longmapsto 496

User Iurisilvio
by
3.8k points