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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Multiplication of Monomials by Binomials and Trinomials
Multiplication of Monomials by Binomials and Trinomials
Last updated at May 29, 2023 by Teachoo
Ex 8.3, 4 (a) (a) Simplify 3x (4x β 5) + 3 and find its values for (i) x = 3 (ii) x = 1/2 3π₯ (4π₯β5)+3 = (3π₯Γ4π₯)β(3π₯Γ5)+3 = 12π₯^2β15π₯+3 (i) For π=π Putting π₯=3 in expression 12π₯^2β15π₯+3 = 12(3)^2β15(3)+3 = (12Γ9)β(15Γ3) +3 = 108β45 +3 = 108β42 = 66 (ii) For π=π/π Putting π₯=1/2 in expression 12π₯^2β15π₯+3 = 12(1/2)^2β15(1/2)+3 = 12(1/2Γ1/2)β 15/2 +3 = 12Γ(1/4)β15/2+3 = 3β15/2+3 = 6β15/2 = (6 Γ 2 β 15)/2 = (12 β 15)/2 = (βπ)/π