Answer:
= −7x−20
Step-by-step explanation:
(2x−5)(3x+4)
= (2x+−5)(3x+4)
= (2x)(3x)+(2x)(4)+(−5)(3x)+(−5)(4)
= +8x−15x−20
= −7x−20
Two pentagons are similar with a scale factor of 3/7
1 answer:
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Answer:
<h3><u>Given Question</u></h3>If
Given pair of equations are
and
On dividing by 2, we get
On multiply equation (1) by 3 and (2) by 4, we get
and
On Subtracting equation (3) from (4), we get
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<h3><u>Concept Used :- </u></h3>There are 4 methods to solve this type of pair of linear equations.
1. Method of Substitution
2. Method of Eliminations
3. Method of Cross Multiplication
4. Graphical Method
We prefer here Method of Eliminations :-
To solve systems using elimination, follow this procedure:
<h3><u>The Elimination Method</u></h3>Step 1: Multiply each equation by a suitable number so that the two equations have the same leading coefficient.
Step 2: Subtract the second equation from the first to eliminate one variable
Step 3: Solve this new equation for other variable.
Step 4: Substitute the value of variable thus evaluated into either Equation 1 or Equation 2 and get the value other variable.
