Question

Find the product of 3x, 2 x 2,. -4xy,. 3y2, 5x3y2​

Answer 1

Answer:

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Step-by-step explanation:(i)

 5x + 7x + (-6x)

= 5x + 7x -6x

= 6x

(ii)

35x +23x +−45x=9x +10x −12x15=7x15

(iii)  

5a2b +( −8a2b)  + 7a2b

= 5a2b − 8a2b + 7a2b

4a2b

(iv)

 34x2 + 5x2+ (−3x2 ) + (−14x2)=34x2 − 14x2 + 5x2−3x2=12x2 + 2x2 = 52x2

(v) Collecting like terms and adding them:

x − 3y + 4z + y − 2x − 8z + 5x − 2y − 3z

= x- 2x + 5x - 3y + y - 2y + 4z - 8z - 3z    

= 4x -4y -7z

(vi) Collecting like terms and adding them:

2x2 − 3y2 + 5x2 + 6y2 + (− 3x2 − 4y2)

= 2x2 + 5x2 − 3x2 − 3y2 +6y2 −4y2= 4x2 −y2                    

(vii) Collecting like terms and adding them:

5x − 2x2 − 8 +  8x2 − 7x − 9 +  3 + 7x2 − 2x

= −2x2 +8x2 + 7x2 + 5x − 7x − 2x −8 −9 + 3= 13x2 −4x −14      

(viii) Collecting like terms and adding them:

23a−45b+35c +(−34a −52b+23c )+ 52a+74b− 56c   b −52b +74b +35c +23c − 56c =(8 −9 +30)a12 + (−16 − 50 +35)b20 + (18 +20 −25)c30=2912a − 3120b + 1330c

(ix) Collecting like terms and adding them:

85x+ 117y+94xy + (− 32x− 53y−95xy)=85x − 32x+ 117y − 53y +94xy −95xy = 110x − 221y + 920xy

(x) Collecting like terms and adding them:

32x3−14x2 +53+(− 54x3+35x2− x+15)+(− x2  +38x−815)= 32x3 − 54x3 −14x2 +35x2− x2  − x +38x +53+15−815=14x3 − 1320x2 −58x +43